id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
|---|---|---|---|---|---|---|
nucl-th/9403019 | Off-Shell NN Potential and Triton Binding Energy | The NONLOCAL Bonn-B potential predicts 8.0 MeV binding energy for the triton
(in a charge-dependent 34-channel Faddeev calculation) which is about 0.4 MeV
more than the predictions by LOCAL NN potentials. We pin down origin and size
of the nonlocality in the Bonn potential, in analytic and numeric form. The
nonlocality... | 1994-03-31 | 2015-06-26 | [
"nucl-th"
] | Y. Song and R. Machleidt (University of Idaho) |
nucl-th/9403017 | Ground-state Correlation Effects in Extended RPA Calculations | We study normalization problems associated with use of perturbatively
correlated ground-states in extended RPA schemes in the context of a specific
but typical example. The sensitivity of the results to the amount of $2p2h$
admixtures to the correlated ground state is also investigated in terms of a
modification of the... | 1994-03-28 | 2016-08-14 | [
"nucl-th"
] | A. Mariano, F. Krmpoti\'c and A.F.R. de Toledo Piza |
nucl-th/9403018 | Double beta decay transition mechanism | After briefly reviewing $\beta \beta$ decay as a test of the neutrino mass, I
examine the nuclear structure involved in this process. Simple formulas (\`{a}
la Pad\'{e}) are designed for the transition amplitudes and the general
behavior of $\beta \beta$ decay amplitudes in the quasiparticle random phase
approximation ... | 1994-03-28 | 2016-08-14 | [
"nucl-th"
] | F. Krmpoti\'c |
nucl-th/9403016 | Shell model on a random gaussian basis | Pauli-projected random gaussians are used as a representation to solve the
shell model equations. The elements of the representation are chosen by a
variational procedure. This scheme is particularly suited to describe cluster
formation and cluster decay in nuclei. It overcomes the basis-size problem of
the ordinary sh... | 1994-03-23 | 2009-09-25 | [
"nucl-th"
] | K. Varga and R. J. Liotta |
nucl-th/9403015 | A quark-meson model for nuclear and neutron matter | An explicit quark model, based on a mean field description of non-overlapping
nucleon bags bound by the self-consistent exchange of $\sigma$, $\omega$ and
$\rho$ mesons, is used to investigate the properties of both nuclear and
neutron matter. We establish a clear understanding of the relationship between
this model, w... | 1994-03-18 | 2010-02-17 | [
"nucl-th"
] | K.Saito and A.W.Thomas |
nucl-th/9403014 | Mesons and the Structure of Nucleons | The role of mesons, particularly the pion, in the structure of nucleons is
reviewed and investigated. Since quark-antiquark pairs are likely to
``transform" into mesons at large distances, mesons are expected to contribute
to nucleon structure. Their effects on the Gottfried sum rule, on the
strangeness content of the ... | 1994-03-18 | 2016-11-03 | [
"nucl-th",
"hep-ph"
] | W. Koepf, E.M. Henley and M. Alberg |
nucl-th/9403013 | Threshold Two-Pion Photo- and Electroproduction: More neutrals than
expected | We present an exploratory study of two pion photo-- and electroproduction off
the nucleon in the threshold region. To calculate the pertinent amplitudes, we
make use of heavy baryon chiral perturbation theory. We show that due to finite
chiral loops the production cross section for final states with two neutral
pions i... | 1994-03-17 | 2009-10-28 | [
"nucl-th",
"hep-ph"
] | V. Bernard, N. Kaiser, Ulf-G. Mei{\ss}ner and A. Schmidt |
nucl-th/9403012 | The Balian-Br\'ezin Method in Relativistic Quantum Mechanics | The method suggested by Balian and Br\'ezin for treating angular momentum
reduction in the Faddeev equations is shown to be applicable to the
relativistic three-body problem. | 1994-03-16 | 2009-10-28 | [
"nucl-th",
"hep-ph"
] | H.-C. Jean, G. L. Payne, and W. N. Polyzou |
nucl-th/9403011 | Antiproton-proton partial-wave analysis below 925 MeV/c | A partial-wave analysis of all antiproton-proton scattering data below 925
MeV/c antiproton laboratory momentum is presented. The method used is adapted
from the Nijmegen phase-shift analyses of pp and np scattering data. The
Nijmegen 1993 antiproton-proton database, consisting of 3646 antiproton-proton
scattering data... | 1994-03-13 | 2009-09-25 | [
"nucl-th"
] | R. Timmermans, Th. A. Rijken, and J. J. de Swart (University of
Nijmegen) |
nucl-th/9403010 | Quark-Gluon-Plasma Formation at SPS Energies? | By colliding ultrarelativistic ions, one achieves presently energy densities
close to the critical value, concerning the formation of a quark-gluon-plasma.
This indicates the importance of fluctuations and the necessity to go beyond
the investigation of average events. Therefore, we introduce a percolation
approach to ... | 1994-03-10 | 2009-10-28 | [
"nucl-th",
"hep-ph"
] | K. Werner |
nucl-th/9403007 | New calculations of the PNC Matrix Element for the $J^{\pi}T$
0$^{+}1,0^{-}1$ doublet in $^{14}$N | A new calculation of the predominantly isoscalar PNC matrix element between
the $J^{\pi}T$ $0^{+}1,0^{-}1$ (E$_{x} \approx$ 8.7 MeV) states in $^{14}$N has
been carried out in a (0+1+2+3+4)$\hbar \omega$ model space with the
Warburton-Brown interaction. The magnitude of the PNC matrix element of 0.22 to
0.34 eV obtaine... | 1994-03-08 | 2016-08-14 | [
"nucl-th"
] | Mihai Horoi, G\"unther Clausnitzer, B. Alex Brown and Ernie K.
Warburton |
nucl-th/9403009 | Nonperturbative aspects of the quark-photon vertex | The electromagnetic interaction with quarks is investigated through a
relativistic, electromagnetic gauge-invariant treatment. Gluon dressing of the
quark-photon vertex and the quark self-energy functions is described by the
inhomogeneous Bethe-Salpeter equation in the ladder approximation and the
Schwinger-Dyson equat... | 1994-03-08 | 2009-09-25 | [
"nucl-th"
] | Michael R. Frank |
nucl-th/9403008 | Scaling Law in Cluster Decay | A recently proposed scaling law for the decay time of alpha particles is
generalized for cluster decay. It is shown that for the decay of even-even
parents, $logT_{1/2}$ depends linearly on the scaling variable
S=(Z$_{c}$Z$_{d})^{0.6}/\sqrt{Q_{c}}$ and on the square root of the reduced
mass of cluster and daughter. | 1994-03-08 | 2009-09-25 | [
"nucl-th"
] | Mihai Horoi, B. Alex Brown and Aurel Sandulescu |
nucl-th/9403006 | Covariant Model for Dynamical Quark Confinement | Based on a recent manifestly covariant time-ordered approach to the
relativistic many-body problem, the quark propagator is defined by a nonlinear
Dyson--Schwinger-type integral equation, with a one-gluon loop. The resulting
energy-dependent quark mass is such that the propagator is singularity-free for
real energies, ... | 1994-03-05 | 2009-10-28 | [
"nucl-th"
] | Helmut Haberzettl |
nucl-th/9403003 | Nuclear Breathing Mode in the Relativistic Mean-Field Theory | The breathing-mode giant monopole resonance is studied within the framework
of the relativistic mean-field (RMF) theory. Using a broad range of parameter
sets, a systematic analysis of constrained incompressibility and excitation
energy of isoscalar monopole states in finite nuclei is performed. A comparison
is made wi... | 1994-03-03 | 2009-10-28 | [
"nucl-th"
] | M.V. Stoitsov, M.L. Cescato, P. Ring and M.M. Sharma (Physics
Department, Technical University Munich, and Max Planck Institut of
Astrophysics, Garching, Germany) |
nucl-th/9403005 | Do parton cascade model results approach chemical equilibrium? | This comment is withdrawn, as the figure on which it was based is
inconsistent with other figures in the text and thus probably incorrect. Using
the other figures, I find that the parton cascade model does approach chemical
equilibrium correctly. | 1994-03-03 | 2008-02-03 | [
"nucl-th",
"hep-ph"
] | David Seibert |
nucl-th/9403004 | Polarizing Stored Beams by Interaction with Polarized Electrons | A polarized, internal electron target gradually polarizes a proton beam in a
storage ring. Here, we derive the spin-transfer cross section for $\vec
e\,(p,\vec p\, )e$\ scattering. A recent measurement of the polarizing effect
of a polarized atomic hydrogen target is explained when the effect of the
atomic electrons is... | 1994-03-03 | 2009-09-25 | [
"nucl-th"
] | C.J. Horowitz and H.O. Meyer |
nucl-th/9403002 | BRST Treatment of the Bohr Collective Hamiltonian at High Spins | The BRST treatment of triaxial systems rotating at high spins is used to
solve perturbatively the $\gamma$-independent Bohr collective hamiltonian. | 1994-03-03 | 2009-10-28 | [
"nucl-th"
] | J. P. Garrahan and D. R. Bes |
nucl-th/9403001 | Nucleon-Nucleon Correlations and Final State Interaction in Inclusive
Quasi-Elastic Electron Scattering off Nuclei at x>1 | Inclusive quasi-elastic electron scattering off nuclei is investigated at
high momentum transfer (Q^2>1 (GeV/c)^2) and x>1 adopting a consistent
treatment of nucleon-nucleon correlations in initial and final states. It is
shown that in case of light as well as complex nuclei the inclusive cross
section at 1.3<x<2 is do... | 1994-03-02 | 2009-10-28 | [
"nucl-th"
] | C. Ciofi degli Atti (1) and S. Simula (2) ((1)Department of Physics,
University of Perugia and Istituto Nazionale di Fisica Nucleare, Sezione di
Perugia, Via A. Pascoli, I- 06100 Perugia, Italy (2) Istituto Nazionale di
Fisica Nucleare, Sezione Sanita', Viale Regina Elena 299, Roma, Italy) |
nucl-th/9402031 | Hard Gammas from Low-Energy Heavy-Ion Collisions | Single-particle radiative mechanism of $\gamma$ emission embedded into the
pre-equilibrium exciton model is used to calculate the $\gamma$ emission from a
decay of $^{160}$Er$^{*}$ created in two different ways. The initial stage of a
reaction is described using momentum-space overlaps of colliding nuclei. We can
repro... | 1994-02-28 | 2007-05-23 | [
"nucl-th"
] | E. Betak (Inst. Physics, 84228 Bratislava, Slovakia) |
nucl-th/9402033 | Comment on: "Transverse-Mass $M_\perp$ Dependence of Dilepton Emission
from Preequilibrium and Quark-Gluon Plasma in High Energy Nucleus-Nucleus
Collisions" | In a recent Letter, Geiger presents calculations of the dilepton emission
from the early stage of ultrarelativistic heavy ion collisions using the parton
cascade model (PCM). He shows that the $M_\perp$ scaling is not observed. In
this Comment, we point out that this is largely due to a defect in the PCM. | 1994-02-28 | 2009-10-28 | [
"nucl-th",
"hep-ph"
] | M. Asakawa |
nucl-th/9402032 | Coulomb plus Nuclear Scattering in Momentum Space for Coupled
Angular-Momentum States | The Vincent--Phatak procedure for solving the momentum-space Schrodinger
equation with combined Coulomb-plus-short-range potentials is extended to
angular momentum states coupled by an optical potential---as occurs in spin 1/2
times 1/2 scattering. A generalization of the Blatt--Biedenharn phase shift
parameterization ... | 1994-02-28 | 2009-09-25 | [
"nucl-th"
] | D. Lu, T. Mefford, G. Song, and R. H. Landau |
nucl-th/9402029 | Quantum Size Effects in Classical Hadrodynamics | We discuss future directions in the development of classical hadrodynamics
for extended nucleons, corresponding to nucleons of finite size interacting
with massive meson fields. This new theory provides a natural covariant
microscopic approach to relativistic nucleus-nucleus collisions that includes
automatically space... | 1994-02-25 | 2008-02-03 | [
"nucl-th"
] | J. Rayford Nix |
nucl-th/9402030 | Stochastic Methods for Quantum Scattering | Quantum scattering at zero energy is studied with stochastic methods. A path
integral representation for the scattering cross section is developed. It is
demonstrated that Monte Carlo simulation can be used to compare effective
potentials which are frequently used in multiple scattering with the exact
result. | 1994-02-25 | 2007-05-23 | [
"nucl-th"
] | Stefan Lenz |
nucl-th/9402028 | Anomalous Crossing Frequency in Odd Proton Nuclei | A generic explanation for the recently observed anomalous crossing
frequencies in odd proton rare earth nuclei is given. As an example, the proton
${1\over 2} [541]$ band in $^{175}$Ta is discussed in detail by using the
angular momentum projection theory. It is shown that the quadrupole pairing
interaction is decisive... | 1994-02-25 | 2009-09-25 | [
"nucl-th"
] | Yang Sun, Shuxian Wen and Da Hsuan Feng |
nucl-th/9402027 | A Fully Isotopic Model of Fragmentation | A general model for the fragmentation of a two-component system (e.g. protons
and neutrons) is proposed and solved exactly. The extension of this model to
any number of components is also shown to be exactly solvable. A connection
between this models and the permutation group is discussed. The notion of
isotopic equiva... | 1994-02-24 | 2008-11-26 | [
"nucl-th"
] | K. C. Chase and A. Z. Mekjian |
nucl-th/9402026 | P,T-Violating Nuclear Matrix Elements in the One-Meson Exchange
Approximation | Expressions for the P,T-violating NN potentials are derived for $\pi$, $\rho$
and $\omega$ exchange. The nuclear matrix elements for $\rho$ and $\omega$
exchange are shown to be greatly suppressed, so that, under the assumption of
comparable coupling constants, $\pi$ exchange would dominate by two orders of
magnitude. ... | 1994-02-24 | 2008-11-26 | [
"nucl-th"
] | I.S. Towner and A.C. Hayes |
nucl-th/9402025 | On the Momentum Dependence of the Nucleon - Nucleus Optical Potential | The momentum dependence of the mean-field contribution to the real part of
the optical model potential is investigated employing realistic nucleon-nucleon
interactions. Within a non-relativistic approach a momentum dependence
originates from the non-locality of the Fock exchange term. Deducing the real
part of the opti... | 1994-02-23 | 2019-08-15 | [
"nucl-th"
] | M.Kleinmann, R.Fritz, H.M\"uther, A.Ramos |
nucl-th/9402024 | Fission fragment orientation and gamma ray emission anisotropy | Experimental data on angular distributions of gamma rays emitted from binary
and ternary spontaneous fission of $^{252}{\rm Cf}$ are analyzed. Their
difference indicates that the alignment of fragments is higher in ternary
fission than in binary one. The consequences of possible relation between the
mechanism of ternar... | 1994-02-22 | 2009-09-25 | [
"nucl-th"
] | A.L.Barabanov |
nucl-th/9402023 | Role of the Low-Lying Isoscalar Dipole Modes in the Polarization
Potential | An analysis of the real and imaginary part of the polarization potential in
terms of the relative contributions of the single collective states for the $
^{208}Pb + ^{208}Pb $ system has been done. The polarization potential has been
calculated within the Feshbach formalism taking into account the collective
states cal... | 1994-02-21 | 2009-09-25 | [
"nucl-th"
] | E. B. Balbutsev, A.V. Unzhakova, M. V. Andres, F. Catara and E. G.
Lanza |
nucl-th/9402022 | Capture of Solar and Higher-Energy Neutrinos by Iodine 127 | We discuss and improve a recent treatment of the absorption of solar
neutrinos by ${}^{127}$I, in connection with a proposed solar neutrino
detector. With standard-solar-model fluxes and an in-medium value of -1.0 for
the axial-vector coupling constant $g_A$, we obtain a ${}^8$B-neutrino cross
section of 3.3$\times 10^... | 1994-02-17 | 2009-09-25 | [
"nucl-th"
] | J. Engel, S. Pittel, and P. Vogel |
nucl-th/9402021 | Hadron widths in mixed-phase matter | We derive classically an expression for a hadron width in a two-phase region
of hadron gas and quark-gluon plasma (QGP). The presence of QGP gives hadrons
larger widths than they would have in a pure hadron gas. We find that the
$\phi$ width observed in a central Au+Au collision at $\sqrt{s}=200$
GeV/nucleon is a few M... | 1994-02-15 | 2008-11-26 | [
"nucl-th",
"hep-ph"
] | David Seibert and Che Ming Ko |
nucl-th/9402020 | Microscopic multicluster description of the neutron-rich helium isotopes | The neutron halo structure of $^{6}$He and of $^{8}$He is studied in a
microscopic three-body and five-body model, respectively. Various cluster
arrangements are included to embody a variety of correlations between the
clusters. The intercluster wave function is determined with the stochastic
variational method. The $^... | 1994-02-15 | 2008-11-26 | [
"nucl-th"
] | K. Varga, Y. Suzuki and Y. Ohbayasi |
nucl-th/9402017 | Fragmentation model and quark/hadron system | Nuclear multifragmentation process can be viewed as a recombination of
nucleons into clusters of various sizes. In a combinatorial analysis, various
moments of cluster size distribution appear to be quite simple in terms of
canonical partition functions. This simple model can also describe a branching
phenomena and a c... | 1994-02-10 | 2007-05-23 | [
"nucl-th",
"hep-ph"
] | Suk-Joon Lee |
nucl-th/9402019 | On the Lorentz structure of the confinement potential | We investigate the Lorentz structure of the confinement potential through a
study of the meson spectrum using Salpeter's instantaneous approximation to the
Bethe-Salpeter equation. The equivalence between Salpeter's and a
random-phase-approximation (RPA) equation enables one to employ the same
techniques developed by T... | 1994-02-10 | 2009-10-28 | [
"nucl-th",
"hep-ph"
] | J. Parramore and J. Piekarewicz |
nucl-th/9402018 | Hydrodynamical assessment of 200 AGeV collisions | We are analyzing the hydrodynamics of 200 A GeV S+S collisions using a new
approach which tries to quantify the uncertainties arising from the specific
implementation of the hydrodynamical model. Based on a previous
phenomenological analysis we use the global hydrodynamics model to show that
the amount of initial flow,... | 1994-02-10 | 2008-11-26 | [
"nucl-th",
"hep-ph"
] | Ekkard Schnedermann and Ulrich Heinz |
nucl-th/9402016 | Theoretical Interpretation of the NE18 Experiment on Nuclear
Transparency in A(e,e'p) Scattering | The spectral function, measured in $A(e,e'p)$ reactions, is distorted by the
final-state interaction of the struck proton with the residual nucleus. This
causes a broadening of the observed transverse-momentum distribution which is
large even in the $d(e,e'p)$ reaction. We discuss the effects of this
$p_{\perp}$-broade... | 1994-02-09 | 2014-11-18 | [
"nucl-th"
] | N.N.Nikolaev, A.Szczurek, J.Speth, J.Wambach, B.G.Zakharov and
V.R.Zoller |
nucl-th/9402015 | Shadowing, Binding and Off-Shell Effects in Nuclear Deep Inelastic
Scattering | We present a unified description of nuclear deep inelastic scattering (DIS)
over the whole region $0<x<1$ of the Bjorken variable. Our approach is based on
a relativistically covariant formalism which uses analytical properties of
quark correlators. In the laboratory frame it naturally incorporates two
mechanisms of DI... | 1994-02-09 | 2009-09-25 | [
"nucl-th",
"hep-ph"
] | S. A. Kulagin, G. Piller and W. Weise |
nucl-th/9402014 | Meson Condensation in Dense Matter Revisited | The results for meson condensation in the literature vary markedly depending
on whether one uses chiral perturbation theory or the current-algebra-plus-PCAC
approach. To elucidate the origin of this discrepancy, we re-examine the role
of the sigma-term in meson condensation. We find that the resolution of the
existing ... | 1994-02-08 | 2009-10-28 | [
"nucl-th"
] | Hiroyuki Yabu, F. Myhrer, and K. Kubodera |
nucl-th/9402010 | Covariant three-body equations in phi^3 field theory | We derive four-dimensional relativistic three-body equations for the case of
a field theory with a three-point interaction vertex. These equations describe
the coupled 2->2, 2->3, and 3->3 processes, and provide the means of
calculating the kernel of the 2->2 Bethe-Salpeter equation. Our equations
differ from all previ... | 1994-02-04 | 2009-10-28 | [
"nucl-th",
"hep-th"
] | A. N. Kvinikhidze and B. Blankleider |
nucl-th/9402012 | Algebraic models of hadron structure: I. Nonstrange baryons | We introduce an algebraic framework for the description of baryons. Within
this framework we study a collective string-like model and show that this model
gives a good overall description of the presently available data. We discuss in
particular masses and electromagnetic couplings, including the transition form
factor... | 1994-02-04 | 2011-07-19 | [
"nucl-th",
"hep-ph"
] | R. Bijker, F. Iachello and A. Leviatan |
nucl-th/9402013 | Pseudo SU(3) Model and Abnormal Parity States | The most important features of the pseudo SU(3) model are reviewed. This
description of heavy deformed nuclei is based on pseudo spin symmetry, and is
able to correctly predict the collective spectra and their transition
amplitudes, using appropriate effective charges. It also gives a very good
description of the exoti... | 1994-02-04 | 2007-05-23 | [
"nucl-th"
] | Jorge G. Hirsch, Octavio Casta\~nos and Peter O. Hess |
nucl-th/9402011 | Convolution approach to the piNN system | The unitary NN-piNN model contains a serious theoretical flaw: unitarity is
obtained at the price of having to use an effective piNN coupling constant that
is smaller than the experimental one. This is but one aspect of a more general
renormalization problem whose origin lies in the truncation of Hilbert space
used to ... | 1994-02-04 | 2011-04-15 | [
"nucl-th"
] | B. Blankleider and A. N. Kvinikhidze |
nucl-th/9402009 | Systematics of Gamow-Teller strengths in mid-fp-shell nuclei | We show that the presently available data on the Gamow-Teller (GT) strength
in mid-fp-shell nuclei are proportional to the product of the numbers of
valence protons and neutron holes in the full fp-shell. This observation leads
to important insights into the mechanism for GT quenching and to a simple
parametrization of... | 1994-02-03 | 2009-10-28 | [
"nucl-th"
] | S. E. Koonin and K. Langanke |
nucl-th/9402007 | The y-scaling in the Delta-region | A scaling variable for electron scattering off nuclei in the Delta-region is
shown to exist. A scaling law for a large variety of scattering data with
different kinematics is found. This property turns out to be very sensitive to
the reaction mechanism. We will show that this outcome follows from drastic
medium induced... | 1994-02-03 | 2009-10-28 | [
"nucl-th"
] | R. Cenni and P. Saracco (INFN sez. Genova, Italy) |
nucl-th/9402006 | Complete 0 hbar omega calculations of Gamow-Teller strengths for nuclei
in the iron region | Gamow-Teller strengths for selected nuclei in the iron region (A~56) have
been investigated via shell-model Monte Carlo calculations with realistic
interactions in the complete fp basis. Results for all cases show significant
quenching relative to single-particle estimates, in quantitative agreement with
(n,p) data. Th... | 1994-02-03 | 2009-09-25 | [
"nucl-th"
] | D. J. Dean, P. B. Radha, K. Langanke, Y. Alhassid, S. E. Koonin, and
W. E. Ormand |
nucl-th/9402008 | The Nucleon-Nucleon Potential in the Chromo-Dielectric Soliton Model:
Statics | We study the N-N interaction in the framework of the chromo-dielectric
soliton model. Here, the long-range parts of the nonabelian gluon
self-interactions are assumed to give rise to a color-dielectric function which
is parameterized in terms of an effective scalar background field. The
six-quark system is confined in ... | 1994-02-03 | 2008-11-26 | [
"nucl-th"
] | W. Koepf, L. Wilets, S. Pepin and Fl. Stancu |
nucl-th/9402003 | The E2 contribution to the 8B -> p + 7Be Coulomb dissociation cross
section | We have calculated the E1 and E2 contributions to the low-energy B-8 + Pb-208
-> p + Be-7 + Pb-208 Coulomb dissociation cross sections using the kinematics
of a recent experiment at RIKEN. Using a potential model description of the
Be-7 (p,gamma) B-8 reaction, we find that the E2 contributions cannot a priori
be ignore... | 1994-02-02 | 2014-11-18 | [
"nucl-th"
] | K. Langanke and T. D. Shoppa |
nucl-th/9402004 | The inverse Laplace transform as the ultimate tool for transverse mass
spectra | New high statistics data from the second generation of ultrarelativistic
heavy-ion experiments open up new possibilities in terms of data analysis. To
fully utilize the potential we propose to analyze the $m_\perp$-spectra of
hadrons using the inverse Laplace transform. The problems with its inherent
ill-definedness ca... | 1994-02-02 | 2009-10-28 | [
"nucl-th"
] | Ekkard Schnedermann |
nucl-th/9402002 | Antisymmetrization of a Mean Field Calculation of the T-Matrix | The usual definition of the prior(post) interaction $V(V^\prime )$ between
projectile and target (resp. ejectile and residual target) being contradictory
with full antisymmetrization between nucleons, an explicit antisymmetrization
projector ${\cal A}$ must be included in the definition of the transition
operator, $ T\... | 1994-02-02 | 2015-06-26 | [
"nucl-th"
] | A.Wierling, B.G.Giraud, F.Mekideche, H.Horiuchi, T.Maruyama,
A.Ohnishi, J.C.Lemm, A.Weiguny |
nucl-th/9402005 | Can the $\Sigma^- nn$ System be Bound? | Motivated by the $\Sigma$-hypernuclear states reported in ($K^-,\pi^{\pm}$)
experiments, we have explored the possibility that there exists a
particle-stable $\Sigma^- nn$ bound state. For the J\"ulich \~A
hyperon-nucleon, realistic-force model, our calculations yield little reason to
expect a positive-parity bound sta... | 1994-02-02 | 2009-09-25 | [
"nucl-th"
] | A. Stadler and B. F. Gibson |
nucl-th/9402001 | Suppression of Hadroproduction in Nuclei | We argue that nuclei are not transparent for fast projectile partons. Color
transparency is effective for final state interactions in heavy particle
production, though nuclear filtering of initial partons can reduce the cross
sections. We show that short-ranged initial state interactions, which have been
neglected so f... | 1994-02-01 | 2009-10-28 | [
"nucl-th"
] | S.V.Akulinichev |
nucl-th/9401021 | Nuclear Anapole Moments in Single Particle Approximation | Nuclear anapole moments of $\;^{133}$Cs, $\;^{203,205}$Tl, $\;^{207}$Pb,
$\;^{209}$Bi are treated in the single-particle approximation. Analytical
results are obtained for the oscillator potential without spin-orbit
interaction. Then the anapole moments are calculated numerically in a
Woods-Saxon potential which includ... | 1994-01-31 | 2009-10-28 | [
"nucl-th"
] | V.F.Dmitriev, I.B. Khriplovich and V.B. Telitsin |
nucl-th/9401020 | Power Moments and Scaling Properties of Nuclear Emulsion Data | Various features of the charge yield in heavy ion collisions are studied.
Considered here are the nuclear emulsion data of $^{84}$Kr, $^{131}$Xe,
$^{197}$Au, $^{238}$U in the energy range of 1 GeV/A. Mean charge yields and
multiplicity distribution of these data indicate that the nuclear fragmentation
at this energy is... | 1994-01-24 | 2008-11-26 | [
"nucl-th",
"hep-ph"
] | S.J.Lee and A.Z. Mekjian |
nucl-th/9401019 | Novel soft-photon analysis of $pp\gamma$ below pion-production threshold | A novel soft-photon amplitude is proposed to replace the conventional Low
soft-photon amplitude for nucleon-nucleon bremsstrahlung. Its derivation is
guided by the standard meson-exchange model of the nucleon-nucleon interaction.
This new amplitude provides a superior description of $pp\gamma$ data. The
predictions of ... | 1994-01-24 | 2009-10-28 | [
"nucl-th"
] | M.K. Liou, R.Timmermans, and B.F. Gibson |
nucl-th/9401018 | QCD Evolution by Finite Element Methods | A simple, new method for solving for the $Q^2$ evolution of parton
distributions in perturbative QCD using cubic splines is described and applied
to the evolution of nonsinglet quark distributions. | 1994-01-21 | 2014-11-18 | [
"nucl-th",
"hep-ph"
] | C.J. Benesh |
nucl-th/9401017 | Electroproductions of Light $\Lambda$- and $\Sigma$-Hypernuclei | Theoretical estimations of production cross sections of light $\Lambda$ and
$\Sigma$ hypernuclei in $(e,e'K^{+})$ reactions at around CEBAF energies are
given. Because of dominant spin-flip amplitudes and large momentum transfers,
unnatural parity states and stretched states of hypernuclei are favorably
excited. They a... | 1994-01-20 | 2009-10-28 | [
"nucl-th"
] | Shoji Shinmura |
nucl-th/9401016 | Seeing the QCD phase transition with phi mesons | A double phi peak structure in the dilepton invariant mass spectrum from
ultrarelativistic heavy ion collisions is proposed as a signal for the phase
transition from the quark-gluon plasma to the hadronic matter. The low mass phi
peak results from the decay of phi mesons with reduced in-medium mass during
the transitio... | 1994-01-20 | 2009-10-28 | [
"nucl-th",
"hep-ph"
] | M. Asakawa and C. M. Ko |
nucl-th/9401014 | Meson Photo- and Electroproduction | Photo- and electroproduction of pions and eta-mesons is studied on the
nucleon. The formalism of such reactions is presented including polarization
degrees of freedom and theoretical approaches are discussed. In particular, the
threshold and $\Delta$-resonance region of pion photoproduction is considered
and recent dev... | 1994-01-19 | 2007-05-23 | [
"nucl-th"
] | Lothar Tiator |
nucl-th/9401015 | Simple Formula for Nuclear Charge Radius | A new formula for the nuclear charge radius is proposed, dependent on the
mass number (A) and neutron excess (N-Z) in the nucleus. It is simple and it
reproduces all the experimentally available mean square radii and their
isotopic shifts of even--even nuclei much better than other frequently used
relations. | 1994-01-19 | 2015-06-26 | [
"nucl-th"
] | B. Nerlo-Pomorska and K. Pomorski (The Maria Curie-Sklodowska
University, Lublin, Poland) |
nucl-th/9401012 | Correlation Dynamics of Green's Functions | We generalize the methods used in the theory of correlation dynamics and
establish a set of equations of motion for many-body correlation green's
functions in the non-relativistic case. These non-linear and coupled equations
of motion describe the dynamical evolution of correlation green's functions of
different order ... | 1994-01-17 | 2015-06-26 | [
"nucl-th"
] | Shun-Jin Wang, Wei Zuo, and Wolfgang Cassing |
nucl-th/9401011 | Role of the $a_1$ meson in dilepton production from hot hadronic matter | Dilepton production from hot hadronic matter is studied in an effective
chiral Lagrangian with pions, $\rho$-mesons, and $a_1$ mesons, We find that the
production rates from reactions that involve axial-vector mesons dominate over
contributions from all other reactions when the dilepton invariant mass is
above 1.5 GeV. | 1994-01-14 | 2009-12-30 | [
"nucl-th",
"hep-ph"
] | Chungsik Song, Che Ming Ko and Charles Gale |
nucl-th/9401013 | On the energy-shell contributions of the three-particle~-~ three-hole
excitations | The response functions for the extended second and third random phase
approximation are compared. A second order perturbation calculation shows that
the first-order amplitude for the direct $3p3h$ excitation from the ground
state cancels with those that are engendered by the $1p1h$-$3p3h$ coupling. As
a consequence non... | 1994-01-14 | 2016-08-14 | [
"nucl-th"
] | A. Mariano, F. Krmpoti\'c and A.F.R. de Toledo Piza |
nucl-th/9401009 | Relativistic Coulomb Sum Rules for $(e,e^\prime)$ | A Coulomb sum rule is derived for the response of nuclei to $(e,e^\prime)$
scattering with large three-momentum transfers. Unlike the nonrelativistic
formulation, the relativistic Coulomb sum is restricted to spacelike
four-momenta for the most direct connection with experiments; an immediate
consequence is that excita... | 1994-01-14 | 2009-09-25 | [
"nucl-th"
] | T.C. Ferr\'ee and D.S. Koltun (Department of Physics and Astronomy,
University of Rochester, Rochester, NY) |
nucl-th/9401010 | Missing and Quenched Gamow Teller Strength | Gamow-Teller strength functions in full $(pf)^{8}$ spaces are calculated with
sufficient accuracy to ensure that all the states in the resonance region have
been populated. Many of the resulting peaks are weak enough to become
unobservable. The quenching factor necessary to bring into agreement the low
lying observed s... | 1994-01-14 | 2009-01-23 | [
"nucl-th"
] | E. Caurier, A. Poves and A. P. Zuker |
nucl-th/9401008 | Analysis of Subthreshold Antiproton Production in p-Nucleus and
Nucleus-Nucleus Collisions in the RBUU Approach | We calculate the subthreshold production of antiprotons in the
Lorentz-covariant RBUU approach employing a weighted testparticle method to
treat the antiproton propagation and absorption nonperturbatively. We find that
the pbar differential cross sections are highly sensitive to the baryon and
antiproton selfenergies i... | 1994-01-13 | 2009-09-25 | [
"nucl-th"
] | Stefan Teis, Wolfgang Cassing, Tomoyuki Maruyama and Ulrich Mosel
(Institut fuer Theoretische Physik, Universitaet Giessen, Giessen, Germany) |
nucl-th/9401007 | Resistance to Collapse: The Tensor Interaction | We consider negative-parity excitations in $^4\mbox{He}$, $J^{\pi}$=$0^-$ and
$1^-$ with isospin $T$=$0$ and $T$=$1$. We show tha t, in contrast to
one-particle one-hole results, in a shell model diagonalization none of the
above collapses to zero energy as the strength of the tensor interaction is
increased. | 1994-01-12 | 2009-09-25 | [
"nucl-th"
] | M. S. Fayache and L. Zamick |
nucl-th/9401006 | Dilepton Production in Nucleon-Nucleon Interactions | Starting from a realistic one--boson--exchange--model fitted to the
amplitudes of elastic nucleon--nucleon scattering and the process
$NN\rightarrow N\Delta$ we perform a fully relativistic and gauge invariant
calculation for the dilepton production in nucleon--nucleon collisions,
including the important effect of prop... | 1994-01-12 | 2009-10-28 | [
"nucl-th"
] | M. Sch\"afer, H. C. D\"onges, A. Engel, U. Mosel (Institut f\"ur
Theoretische Physik, Universit\"at Giessen Giessen, Germany) |
nucl-th/9401005 | Three-body resonances in He-6, Li-6, and Be-6, and the soft dipole mode
problem of neutron halo nuclei | Using the complex scaling method, the low-lying three-body resonances of
$^6$He, $^6$Li, and $^6$Be are investigated in a parameter-free microscopic
three-cluster model. In $^6$He a 2$^+$, in $^6$Li a 2$^+$ and a 1$^+$, and in
$^6$Be the 0$^+$ ground state and a 2$^+$ excited state is found. The other
experimentally kn... | 1994-01-11 | 2009-09-25 | [
"nucl-th"
] | Attila Csoto |
nucl-th/9401004 | Baryon-Baryon Interactions | After a short survey of some topics of interest in the study of baryon-baryon
scattering, the recent Nijmegen energy dependent partial wave analysis (PWA) of
the nucleon-nucleon data is reviewed. In this PWA the energy range for both pp
and np is now 0 < Tlab < 350 MeV and a chi^2_{d.o.f.}=1.08 was reached. The
implica... | 1994-01-10 | 2009-09-25 | [
"nucl-th"
] | Th.A. Rijken |
nucl-th/9401003 | Properties of the phi meson at finite temperature | We calculate the $\phi$-meson propagator at finite temperature at the
one--loop order. The real and imaginary parts are studied separately in full
kinematic ranges. From this activity we investigate how temperature affects
such things as decay widths and dispersion relations. {}From here we estimate
the thermal rate of... | 1994-01-06 | 2009-10-28 | [
"nucl-th",
"hep-ph"
] | Kevin L. Haglin and Charles Gale |
nucl-th/9401002 | Searching for Color Coherent Effects at Intermediate $Q^2$ via Double
Scattering Processes | We propose that measuring the $Q^2$ dependence of the number of final-state
interactions of the recoil protons in quasi-elastic electron scattering from
light nuclei is a new method to investigate Color Coherent effects at {\bf
intermediate} values of $Q^2$ ({$\sim$ few $(GeV/c)^2$}). This is instead of
measuring event... | 1994-01-05 | 2009-10-28 | [
"nucl-th"
] | K. Egiyan, L. Frankfurt, W.R. Greenberg, G.A. Miller, M. Sargsyan and
M. Strikman |
nucl-th/9401001 | Relativistically generated asymmetry in the missing momentum
distribution from the $(e,e'p)$ reaction | We calculate the asymmetry in the missing-momentum distribution from the
$(e,e'p)$ reaction in a relativistic formalism. Longitudinal and transverse
response functions are evaluated in parallel kinematics as a function of the
three-momentum transfer to the nucleus. Analytic expressions for the responses
are obtained in... | 1994-01-04 | 2009-09-25 | [
"nucl-th",
"hep-ph"
] | S. Gardner and J. Piekarewicz |
patt-sol/9412003 | Periodicity of cylindrical linear cellular automata | Periodicity and relaxation are investigated for the trajectories of the
states in cylindrical linear cellular automata. The time evolutions are
described with matrices. The eigenvalue analysis is applied to obtain the
maximum values of period and relaxation. The translational invariance
suppresses the maximum period an... | 1994-12-15 | 2008-02-03 | [
"patt-sol",
"nlin.PS"
] | Shin-ichi Tadaki |
patt-sol/9412002 | The Swift-Hohenberg Equation Requires Non-Local Modifications to Model
Spatial Pattern Evolution of Physical Problems | I argue that ``good'' mathematical models of spatio-temporal dynamics in
two-dimensions require non-local operators in the nonlinear terms.
Consequently, the often used Swift-Hohenberg equation requires modification as
it is purely local. My aim here is to provoke more critical examination of the
rationale for using th... | 1994-12-09 | 2008-02-03 | [
"patt-sol",
"nlin.PS"
] | A.J. Roberts (University of Southern Queensland) |
patt-sol/9412001 | Observation of Conservations Laws in Diffusion Limited Aggregation | We repeat the numerical experiments for diffusion limited aggregation (DLA)
and show that there is a potentially infinite set of conserved quantities for
the long time asymptotics. We connect these observations with the exact
integrability of the continuum limit of the DLA (quasi-static Stefan problem).
The conserved q... | 1994-12-06 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | Mark B. Mineev-Weinstein and Ronnie Mainieri (Center for Nonlinear
Studies) |
patt-sol/9411003 | Defect Dynamics for Spiral Chaos in Rayleigh-Benard Convection | A theory of the novel spiral chaos state recently observed in Rayleigh-Benard
convection is proposed in terms of the importance of invasive defects i.e
defects that through their intrinsic dynamics expand to take over the system.
The motion of the spiral defects is shown to be dominated by wave vector
frustration, rath... | 1994-12-01 | 2009-10-28 | [
"patt-sol",
"chao-dyn",
"nlin.CD",
"nlin.PS"
] | M.C. Cross and Yuhai Tu (California Institute of Technology) |
patt-sol/9411002 | On the validity of mean-field amplitude equations for counterpropagating
wavetrains | We rigorously establish the validity of the equations describing the
evolution of one-dimensional long wavelength modulations of counterpropagating
wavetrains for a hyperbolic model equation, namely the sine-Gordon equation. We
consider both periodic amplitude functions and localized wavepackets. For the
localized case... | 1994-11-29 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | R.D. Pierce (Dept. of Math., Pennsylvania State University), C. E.
Wayne (Dept. of Math., Pennsylvania State University) |
patt-sol/9411001 | Front propagation into unstable and metastable states in Smectic C*
liquid crystals: linear and nonlinear marginal stability analysis | We discuss the front propagation in ferroelectric chiral smectics (SmC*)
subjected to electric and magnetic fields applied parallel to smectic layers.
The reversal of the electric field induces the motion of domain walls or fronts
that propagate into either an unstable or a metastable state. In both regimes,
the front ... | 1994-11-16 | 2009-10-28 | [
"patt-sol",
"cond-mat",
"nlin.PS"
] | Wim van Saarloos (1), Martin van Hecke (1) and Robert Holyst (2) ((1)
Institute Lorentz, Leiden University, 2300 RA Leiden, The Netherlands (2)
Institute of Physical Chemistry of the Polish Academy of Sciences, Dept. III,
Kasprzaka 44/52, 01224 Warsaw, Poland) |
patt-sol/9410001 | A Variational Principle for the Asymptotic Speed of Fronts of the
Density Dependent Diffusion--Reaction Equation | We show that the minimal speed for the existence of monotonic fronts of the
equation $u_t = (u^m)_{xx} + f(u)$ with $f(0) = f(1) = 0$, $m >1$ and $f>0$ in
$(0,1)$ derives from a variational principle. The variational principle allows
to calculate, in principle, the exact speed for arbitrary $f$. The case $m=1$
when $f'... | 1994-10-27 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | R. D. Benguria and M. C. Depassier (Facultad de Fisica, U. Catolica de
Chile, Santiago, Chile) |
patt-sol/9409005 | Bipolar Electrodiffusion model for Electroconvection in Nematics | The common description of the electrical behavior of a nematic liquid crystal
as an anisotropic dielectric medium with (weak) ohmic conductivity is extended
to an electrodiffusion model with two active ionic species. Under appropriate,
but rather general conditions the additional effects can lead to a distinctive
chang... | 1994-09-23 | 2008-02-03 | [
"patt-sol",
"nlin.PS"
] | Martin Treiber and Lorenz Kramer (Physikalisches Institut,
Universitaet Bayreuth, Postfach 101251, D-95440 Bayreuth, Germany) |
patt-sol/9409004 | Jam phases in two-dimensional cellular automata model of traffic flow | The jam phases in a two-dimensional cellular automata model of traffic flow
are investigated by computer simulations. Two different types of the jam phases
are found. The spatially diagonal long-range correlation obeys the power law at
the low-density jam configurations. The diagonal correlation exponentially
decays at... | 1994-09-22 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | Shin-ichi Tadaki and Macoto Kikuchi |
patt-sol/9409002 | Hole Solutions in the 1d Complex Ginzburg-Landau Equation | The cubic Complex Ginzburg-Landau Equation (CGLE) has a one parameter family
of traveling localized source solutions. These so called 'Nozaki-Bekki holes'
are (dynamically) stable in some parameter range, but always structually
unstable: A perturbation of the equation in general leads to a (positive or
negative) monoto... | 1994-09-17 | 2015-06-26 | [
"patt-sol",
"nlin.PS"
] | Stefan Popp (1), Olaf Stiller (1), Igor Aranson (2) and Lorenz Kramer
(1) ((1) Physikalisches Institut der Universitaet Bayreuth D-95440 Bayreuth,
Germany (2) Department of Physics, Bar-Ilan University, Ramat Gan 52900,
Israel) |
patt-sol/9409003 | From the defocusing nonlinear Schroedinger to the complex
Ginzburg-Landau equation | Perturbation approaches developed so far for the dark soliton solutions of
the (fully integrable) defocusing nonlinear Schroedinger equation cannot
describe the dynamics resulting from dissipative perturbations of the
Ginzburg-Landau type. Here spatially slowly decaying changes of the background
wavenumber occur which ... | 1994-09-17 | 2015-06-26 | [
"patt-sol",
"nlin.PS"
] | Olaf Stiller, Stefan Popp and Lorenz Kramer (Physikalisches Institut
der Universitaet Bayreuth D-95440 Bayreuth, Germany) |
patt-sol/9409001 | Bound Pairs of Fronts in a Real Ginzburg-Landau Equation Coupled to a
Mean Field | Motivated by the observation of localized traveling-wave states (`pulses') in
convection in binary liquid mixtures, the interaction of fronts is investigated
in a real Ginzburg-Landau equation which is coupled to a mean field. In that
system the Ginzburg-Landau equation describes the traveling-wave amplitude and
the me... | 1994-09-06 | 2015-06-26 | [
"patt-sol",
"nlin.PS"
] | Henar Herrero (Departamento de Fisica y Matematica Aplicada, Facultad
de Ciencias, Universidad de Navarra, 31080 Pamplona, Navarra, Spain) and
Hermann Riecke (Department of Engineering Sciences and Applied Mathematics,
Northwestern University, Evanston, IL, USA) |
patt-sol/9408001 | Variational Characterization of the Speed of Propagation of Fronts for
the Nonlinear Diffusion Equation | We give an integral variational characterization for the speed of fronts of
the nonlinear diffusion equation $u_t = u_{xx} + f(u)$ with $f(0)=f(1)=0$, and
$f>0$ in $(0,1)$, which permits, in principle, the calculation of the exact
speed for arbitrary $f$. | 1994-09-01 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | R. D. Benguria and M. C. Depassier (Facultad de Fisica P. Universidad
Catolica de Chile Casilla 306, Santiago 22, Chile) |
patt-sol/9407001 | Universal trapping scaling on the unstable manifold for a collisionless
electrostatic mode | An amplitude equation for an unstable mode in a collisionless plasma is
derived from the dynamics on the two-dimensional unstable manifold of the
equilibrium. The mode amplitude $\rho(t)$ decouples from the phase due to the
spatial homogeneity of the equilibrium, and the resulting one-dimensional
dynamics is analyzed u... | 1994-07-06 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | John David Crawford (Department of Physics and Astronomy, University
of Pittsburgh, Pittsburgh, PA) |
patt-sol/9406001 | The Korteweg-de Vries Hierarchy and Long Water-Waves | By using the multiple scale method with the simultaneous introduction of
multiple times, we study the propagation of long surface-waves in a shallow
inviscid fluid. As a consequence of the requirements of scale invariance and
absence of secular terms in each order of the perturbative expansion, we show
that the Kortewe... | 1994-06-17 | 2009-10-28 | [
"patt-sol",
"nlin.PS",
"nlin.SI",
"solv-int"
] | R. A. Kraenkel, M. A. Manna (Physique Mathematique et Theorique,
URA-CNRS 768 Universite de Montpellier 34095 Montpellier CEDEX 05, France)
and J. G. Pereira (Instituto de Fisica Teorica, Universidade Estadual
Paulista Rua Pamplona 145) |
patt-sol/9405001 | Complex Patterns in Reaction-Diffusion Systems: A Tale of Two Front
Instabilities | Two front instabilities in a reaction-diffusion system are shown to lead to
the formation of complex patterns. The first is an instability to transverse
modulations that drives the formation of labyrinthine patterns. The second is a
Nonequilibrium Ising-Bloch (NIB) bifurcation that renders a stationary planar
front uns... | 1994-05-26 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | Aric Hagberg (Program in Applied Mathematics, University of Arizona,
Tucson, AZ) and Ehud Meron (Department of Mathematics, University of Arizona,
Tucson, AZ) |
patt-sol/9404007 | New Sets of Kink Bearing Hamiltonians | Given a kink bearing Hamiltonian, Isospectral Hamiltonian approach is used in
generating new sets of Hamiltonains which also admit kink solutions. We use
Sine-Gordon model as a example and explicitly work out the new sets of
potentials and the solutions. | 1994-04-28 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | B. Dey (Department of Physics, University of Poona, Ganeshkhind, Pune
411 007, India) and C.N. Kumar (Centre for Theoretical Studies, Indian
Institute of Science, Bangalore 560012, India) |
patt-sol/9404006 | Normal Form, Symmetry and Infinite Dimensional Lie Algebra for System of
Ode's | The normal form for a system of ode's is constructed from its polynomial
symmetries of the linear part of the system, which is assumed to be
semi-simple. The symmetries are shown to have a simple structure such as
invariant function times symmetries of degree one called basic symmetries. We
also show that the set of sy... | 1994-04-27 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | Yuji Kodama |
patt-sol/9404005 | Dynamic Front Transitions and Spiral-Vortex Nucleation | This is a study of front dynamics in reaction diffusion systems near
Nonequilibrium Ising-Bloch bifurcations. We find that the relation between
front velocity and perturbative factors, such as external fields and curvature,
is typically multivalued. This unusual form allows small perturbations to
induce dynamic transit... | 1994-04-25 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | Christian Elphick (Department of Physics, Universidad T\'ecnica
Federico Santa Maria, Valparaiso, Casilla 110-V, Chile), Aric Hagberg
(Program in Applied Mathematics, University of Arizona, Tucson, AZ) and Ehud
Meron (The Jacob Blaustein Institute, for Desert Research and The Physics
Department Ben-Gurion Unive... |
patt-sol/9404004 | Example of shock wave in unstaible medium: The focusing nonlinear
Schrodinger equation | Dissipationless shock waves in modulational unstable one-dimensional medium
are investigated on the simplest example of integrable focusing nonlinear
Schr\''odinger (NS) equation. Our approach is based on the construction of
special exact solution of the Whitham-NS system, which ''partially saturates''
the modulational... | 1994-04-21 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | Ramil' F.Bikbaev, Vadim R.Kudashev (Institute of Mathematics,
Chernyshevskii 112, Ufa, Russia) |
patt-sol/9404003 | Whitham deformations partially saturating the modulational instability
in the nonlinear Schrodinger equation | In the framework of Gurevich and Pitaevskii approach [1] we construct
modulated by Whitham [2] solution of nonlinear Shrodinger (NS) equation
partially saturating the modulational instability. This solution describes new
scenario of monochromatic wave evolution in NS equation which leads to
generation of new phase and ... | 1994-04-20 | 2008-02-03 | [
"patt-sol",
"nlin.PS"
] | Ramil' F. Bikbaev, Vadim R. Kudashev (Institute of Mathematics,
Chernyshevskii, Ufa, Russia) |
patt-sol/9404002 | KdV shock-like waves as invariant solutions of KdV equation symmetries | We consider the following hypothesis: some of KdV equation shock-like waves
are invariant with respect to the combination of the Galilean symmetry and KdV
equation higher symmetries. Also we demonstrate our approach on the example of
Burgers equation. | 1994-04-07 | 2008-02-03 | [
"patt-sol",
"nlin.PS"
] | Vadim R. Kudashev (Institute of Mathematics, Ufa, Russia) |
patt-sol/9403004 | Kinks in the Presence of Rapidly Varying Perturbations | Dynamics of sine-Gordon kinks in the presence of rapidly varying periodic
perturbations of different physical origins is described analytically and
numerically. The analytical approach is based on asymptotic expansions, and it
allows to derive, in a rigorous way, an effective nonlinear equation for the
slowly varying f... | 1994-03-30 | 2008-02-03 | [
"patt-sol",
"nlin.PS"
] | Yuri S. Kivshar (Optical Sci. Centre, Australian National Univ.) Niels
Gr\{o}nbech-Jensen (Theor. Div., Los Alamos Nat. Lab.) Robert D. Parmentier
(Dipt. Fisica, Univ. Salerno) |
patt-sol/9403005 | Inverse ac Josephson Effect for a Fluxon in a Long Modulated Junction | We analyze motion of a fluxon in a weakly damped ac-driven long Josephson
junction with a periodically modulated maximum Josephson current density. We
demonstrate both analytically and numerically that a pure {\it ac} bias current
can drive the fluxon at a {\it resonant} mean velocity determined by the
driving frequenc... | 1994-03-30 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | Giovanni Filatrella (Phys. Inst., Univ. T\"ubingen) Boris A. Malomed
(Dept. Appl. Math., Tel Aviv Univ.) Robert D. Parmentier (Dipt. Fisica, Univ.
Salerno) |
patt-sol/9403003 | New exact fronts for the nonlinear diffusion equation with quintic
nonlinearities | We consider travelling wave solutions of the reaction diffusion equation with
quintic nonlinearities $u_t = u_{xx} + \mu u (1 -u )
( 1 +\alpha u + \beta u^2 +\gamma u^3)$. If the parameters $\alpha , \beta$
and $\gamma$ obey a special relation, then the criterion for the existence of a
strong heteroclinic connection ... | 1994-03-21 | 2009-10-28 | [
"patt-sol",
"nlin.PS"
] | R. D. Benguria and M. C. Depassier (Facultad de Fisica, P. Universidad
Catolica de Chile, Santiago, Chile) |
patt-sol/9403002 | Asymptotic expansion for layer solutions of a singularly perturbed
reaction-diffusion system | For a singularly perturbed system of reaction--diffusion equations, assuming
that the 0th order solutions in regular and singular regions are all stable, we
construct matched asymptotic expansions for formal solutions to any desired
order in $\epsilon$. The formal solution shows that there is an invariant
manifold of w... | 1994-03-18 | 2008-02-03 | [
"patt-sol",
"chao-dyn",
"nlin.CD",
"nlin.PS"
] | Xiao-Biao Lin (Department of Mathematics, North Carolina State
University, Raleigh, North Carolina) |
patt-sol/9403001 | On the validity of the linear speed selection mechanism for fronts of
the nonlinear diffusion equation | We consider the problem of the speed selection mechanism for the one
dimensional nonlinear diffusion equation $u_t = u_{xx} + f(u)$. It has been
rigorously shown by Aronson and Weinberger that for a wide class of functions
$f$, sufficiently localized initial conditions evolve in time into a monotonic
front which propag... | 1994-03-08 | 2016-08-14 | [
"patt-sol",
"nlin.PS"
] | R. D. Benguria and M. C. Depassier (Facultad de F\'isica, P.
Universidad Cat\'olica de Chile, Casilla 306, Santiago 22, Chile) |
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