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 |
|---|---|---|---|---|---|---|
hep-lat/9206025 | Scaling analysis of the O(4)-symmetric $\Phi^4$-theory in the broken
phase | We study the $O(4)$-symmetric $ \Phi^4 $-theory in the scaling region of the
broken phase using the standard and a Symanzik improved action with infinite
bare self-coupling $\lambda$. A high precision Monte Carlo simulation is
performed by applying the reflection cluster algorithm. Employing the histogram
method we ana... | 1992-06-29 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Meinulf G\"ockeler, Hans A. Kastrup, Thomas Neuhaus, Frank Zimmermann |
hep-lat/9206024 | The Four-Fermi Model in Three Dimensions at Non-Zero Density and
Temperature | The Four Fermi model with discrete chiral symmetry is studied in three
dimensions at non-zero chemical potential and temperature using the Hybrid
Monte Carlo algorithm. The number of fermion flavors is chosen large $(N_f=12)$
to compare with analytic results. A first order chiral symmetry restoring
transition is found ... | 1992-06-29 | 2009-10-22 | [
"hep-lat"
] | Simon Hands (CERN), Aleksandar Kocic (CERN) and John Kogut (Illinois) |
hep-lat/9206023 | Lattice QCD Spectroscopy with an Improved Wilson Fermion Action | We study the hadronic spectrum in quenched lattice QCD using an improved
Wilson fermion action (Hamber-Wu(1983),Eguchi-Kawamoto(1984)) at $\beta= 5.7$
and $\beta =6.0$. We find a systematic reduction of the finite spacing effects
compared to the results obtained by using the standard Wilson action. | 1992-06-27 | 2009-10-22 | [
"hep-lat"
] | M.-P. Lombardo, G.Parisi and A. Vladikas |
hep-lat/9206022 | Properties of Interfaces in the two and three dimensional Ising Model | To investigate order-order interfaces, we perform multimagnetical Monte Carlo
simulations of the $2D$ and $3D$ Ising model. Following Binder we extract the
interfacial free energy from the infinite volume limit of the magnetic
probability density. Stringent tests of the numerical methods are performed by
reproducing wi... | 1992-06-25 | 2009-10-22 | [
"hep-lat"
] | B.A.Berg, U.Hansmann (SCRI,FSU) and T.Neuhaus (Uni Bielefeld) |
hep-lat/9206021 | Numerical Study of c>1 Matter Coupled to Quantum Gravity | We present the results of a numerical simulation aimed at understanding the
nature of the `c = 1 barrier' in two dimensional quantum gravity. We study
multiple Ising models living on dynamical $\phi^3$ graphs and analyse the
behaviour of moments of the graph loop distribution. We notice a universality
at work as the av... | 1992-06-24 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | Simon M. Catterall, John B. Kogut, and Ray L. Renken |
hep-lat/9206020 | Low temperature expansion for the 3-d Ising Model | We compute the weak coupling expansion for the energy of the three
dimensional Ising model through 48 excited bonds. We also compute the
magnetization through 40 excited bonds. This was achieved via a recursive
enumeration of states of fixed energy on a set of finite lattices. We use a
linear combination of lattices wi... | 1992-06-24 | 2009-10-22 | [
"hep-lat"
] | Gyan Bhanot, Michael Creutz, and Jan Lacki |
hep-lat/9206019 | London relation and fluxoid quantization for monopole currents in U(1)
lattice gauge theory | We explore the analogy between quark confinement and the Meissner effect in
superconductors. We measure the response of color-magnetic "supercurrents" from
Dirac magnetic monopoles to the presence of a static quark-antiquark pair in
four dimensional U(1) lattice gauge theory. Our results indicate that in the
confined p... | 1992-06-23 | 2009-10-22 | [
"hep-lat"
] | Vandana Singh, Richard W. Haymaker and Dana A. Browne |
hep-lat/9206017 | Tunneling and the Spectrum of the Potts Model | The three-dimensional, three-state Potts model is studied as a paradigm for
high temperature quantum chromodynamics. In a high statistics numerical
simulation using a Swendson-Wang algorithm, we study cubic lattices of
dimension as large as $64^3$ and measure correlation functions on long lattices
of dimension $20^2\ti... | 1992-06-22 | 2008-11-26 | [
"hep-lat"
] | Jing-Dong Wang and Carleton DeTar |
hep-lat/9206018 | Spectroscopy, Scaling and Critical Indices in Strongly Coupled Quenched
QED | The interplay of spectroscopy, scaling laws and critical indices is studied
in strongly coupled quenched QED. Interpreted as a model of technicolor having
strong interactions at short distances, we predict the techni-meson mass
spectrum in a simplified model of a dynamically generated top quark mass $M_f$.
Our results ... | 1992-06-22 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | A.Kocic, J.B. Kogut, M.-P. Lombardo and K.C. Wang |
hep-lat/9206016 | Numerical study of Yang-Mills classical solutions on the twisted torus | We use the lattice cooling method to investigate the structure of some gauge
fixed SU(2) Yang-Mills classical solutions of the euclidean equations of motion
which are defined in the 3-torus with symmetric twisted boundary conditions. | 1992-06-17 | 2009-10-22 | [
"hep-lat"
] | M. Garcia Perez and A. Gonzalez-Arroyo |
hep-lat/9206013 | A Method for Simulating Chiral Fermions on the Lattice | A method for simulating chiral gauge theories on the lattice is proposed,
involving zeromodes on a topological defect. Lattice doublers may be decoupled
in a gauge invariant manner, and flavor anomalies can be directly observed on a
finite lattice. (Requires harvmac) | 1992-06-11 | 2011-07-19 | [
"hep-lat",
"hep-ph"
] | D.B. Kaplan |
hep-lat/9206015 | The XY Model Coupled to Two-Dimensional Quantum Gravity | We perform Monte Carlo simulations using the Wolff cluster algorithm of the
XY model on both fixed and dynamical phi-cubed graphs (i.e. without and with
coupling to two-dimensional quantum gravity). We compare the numerical results
with the theoretical expectation that the phase transition remains of KT type
when the X... | 1992-06-11 | 2009-10-22 | [
"hep-lat"
] | C.F. Baillie and D.A. Johnston |
hep-lat/9206014 | Chiral Fermions and Anomalies on a Finite Lattice | A recent proposal by Kaplan for a chiral gauge theory on the lattice is
tested with background gauge fields. The spectrum of the finite lattice
Hamiltonian is calculated and the existence of a chiral fermion is
demonstrated. Lattice doublers are found to decouple. The flavor anomalies,
which are in agreement with the c... | 1992-06-10 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Karl Jansen |
hep-lat/9206012 | An Effective Model for Crumpling in Two Dimensions? | We investigate the crumpling transition for a dynamically triangulated random
surface embedded in two dimensions using an effective model in which the
disordering effect of the $X$ variables on the correlations of the normals is
replaced by a long-range ``antiferromagnetic'' term. We compare the results
from a Monte Ca... | 1992-06-08 | 2009-10-22 | [
"hep-lat"
] | C.F. Baillie and D.A. Johnston |
hep-lat/9206007 | Virtual Bond Percolation for Ising Cluster Dynamics | The Fortuin-Kasteleyn mapping between the Ising model and the site-bond
correlated percolation model is shown to be only one of an infinite class of
exact mappings. These new cluster representations are a result of
"renormalized" percolation rules correlated to entire blocks of spins. For
example these rules allow for ... | 1992-06-04 | 2009-10-22 | [
"hep-lat"
] | R. Brower and P. Tamayo |
hep-lat/9206009 | Hopping Parameter Expansion for Heavy-Light Systems | We present a technique which permits the calculation of two-point functions
of operators containing one heavy quark and an arbitrary number of light quarks
as analytic functions of the heavy-quark mass. It is based on the standard
Jacobi linear solver used for the calculation of quark propagators. Results for
the heavy... | 1992-06-04 | 2010-11-01 | [
"hep-lat"
] | D.S. Henty and R.D. Kenway |
hep-lat/9206010 | Absence of Chiral Fermions in the Eichten--Preskill Model | The model proposed by Eichten and Preskill for obtaining theories with chiral
fermions from the lattice is shown to undergo spontaneous symmetry breaking. In
addition, the fermions appear to be Dirac-like everywhere in the phase diagram
with no room for undoubled Weyl fermions. The phase diagram of a closely
related Hi... | 1992-06-04 | 2009-10-22 | [
"hep-lat"
] | Maarten Golterman, Don Petcher and Elena Rivas |
hep-lat/9206011 | More about orbitally excited hadrons from lattice QCD | This is a second paper describing the calculation of spectroscopy for
orbitally excited states from lattice simulations of Quantum Chromodynamics.
New features include higher statistics for P-wave systems and first results for
the spectroscopy of D-wave mesons and baryons, for relatively heavy quark
masses. We paramete... | 1992-06-04 | 2009-10-22 | [
"hep-lat"
] | T. A. DeGrand and M. W. Hecht |
hep-lat/9206008 | Fermion-Higgs model with Reduced Staggered Fermions | We introduce a lattice fermion-Higgs model with one component `reduced
staggered' fermions. In order to use the fermion field as efficiently as
possible we couple the two {\em staggered} flavors to the O(4) Higgs field
leading to a model with only one SU(2) doublet in the scaling region. The
number of fermions is doubl... | 1992-06-03 | 2009-10-22 | [
"hep-lat"
] | Wolfgang Bock, Jan Smit and Jeroen C. Vink |
hep-lat/9206004 | Resonance Scattering Phase Shifts in a 2-d Lattice Model | We study a simple 2-d model representing two fields with different mass and a
3-point coupling term. The phase shift in the resonating 2-particle channel is
determined from the energy spectrum obtained in Monte Carlo simulations on
finite lattices. Masses and wave function renormalization constants of the
fields as wel... | 1992-06-03 | 2009-10-22 | [
"hep-lat"
] | C.R. Gattringer and C.B. Lang |
hep-lat/9206003 | Finite size effects and scaling in lattice CP(N-1) | We present model predictions for the spectrum of $CP^{N-1}$ in a periodic box
and use them to interpret the strong finite size effects observed in lattice
simulations at medium values of $N$. The asymptotic scaling behaviour of
alternative lattice actions is discussed along with some aspects of multigrid
algorithm effi... | 1992-06-03 | 2008-11-26 | [
"hep-lat"
] | A.C. Irving and C. Michael |
hep-lat/9206005 | Massless Decoupled Doublers: Chiral Yukawa Models and Chiral Gauge
Theories | We present a new method for regularizing chiral theories on the lattice. The
arbitrariness in the regularization is used in order to decouple massless
replica fermions. A continuum limit with only one fermion is obtained in
perturbation theory and a Golterman-Petcher like symmetry related to the
decoupling of the repli... | 1992-06-03 | 2009-10-22 | [
"hep-lat"
] | J.L. Alonso, Ph. Boucaud, J.L. Cortes, F. Lesmes, E. Rivas |
hep-lat/9206006 | Gauge Fixing on the Lattice without Ambiguity | A new gauge fixing condition is discussed, which is (lattice) rotation
invariant, has the `smoothness' properties of the Landau gauge but can be
efficiently computed and is unambiguous for almost all lattice gauge field
configurations. | 1992-06-03 | 2011-07-19 | [
"hep-lat"
] | Jeroen C. Vink and Uwe-Jens Wiese |
hep-lat/9206001 | Lattice QCD with 8 Light Quark Flavors | QCD with eight flavors is studied on $16^3\times N_t$ lattices with $N_t=4$,
6, 8, 16 and 32, a dynamical quark mass $ma=0.015$ and lattice coupling
$\beta=6/g^2$ between 4.5 and 5.0. For $N_t=16$ and 32, hadron masses and
screening lengths are computed for a variety of valence quark masses. The
previously observed, st... | 1992-06-02 | 2016-08-31 | [
"hep-lat"
] | Frank R. Brown, Hong Chen, Norman H. Christ, Zhihua Dong, Robert D.
Mawhinney, Wendy Schaffer, and Alessandro Vaccarino |
hep-lat/9206002 | Exact Solution of Induced Lattice Gauge Theory at Large $N$ | We find the exact solution of a recently proposed model of the lattice gauge
theory induced by heavy scalar field in adjoint representation at $ N= \infty $
for arbitrary dimension $D$. The nonlinear integral equation for the gauge
invariant density of eigenvalues of the vacuum average of the scalar field is
derived. I... | 1992-06-02 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | A.A. Migdal |
hep-lat/9205030 | Renormalization group and triviality in noncompact lattice QED with
light fermions | In the framework of noncompact lattice QED with light fermions, we derive the
functional dependence of the average energy per plaquette on the bare
parameters using block-spin Renormalization Group arguments and assuming that
the renormalized coupling vanishes. Our numerical results for this quantity in
$8^4$ and $10^4... | 1992-06-01 | 2015-06-25 | [
"hep-lat"
] | V. Azcoiti, G. Di Carlo and A.F. Grillo |
hep-lat/9205029 | Three Dimensional Quantum Gravity Coupled to Ising Matter | We establish the phase diagram of three--dimensional quantum gravity coupled
to Ising matter. We find that in the negative curvature phase of the quantum
gravity there is no disordered phase for ferromagnetic Ising matter because the
coordination number of the sites diverges. In the positive curvature phase of
the quan... | 1992-06-01 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | R.L. Renken, S.M. Catterall, and J.B. Kogut |
hep-lat/9205028 | Numerical Investigation of the Interface Tension in the
three-dimensional Ising Model | The interface tension in the three-dimensional Ising model in the low
temperature phase is investigated by means of the Monte Carlo method. Together
with other physically relevant quantities it is obtained from a calculation of
time-slice correlation functions in a cylindrical geometry. The results at
three different v... | 1992-05-29 | 2010-12-23 | [
"hep-lat"
] | Sabine Klessinger and Gernot Muenster |
hep-lat/9205027 | High-Temperature series for the $RP^{n-1}$ lattice spin model
(generalized Maier-Saupe model of nematic liquid crystals) in two space
dimensions and with general spin dimensionality n | High temperature series expansions of the spin-spin correlation functions of
the RP^{n-1} spin model on the square lattice are computed through order
beta^{8} for general spin dimensionality n. Tables are reported for the
expansion coefficients of the energy per site, the susceptibility and the
second correlation momen... | 1992-05-27 | 2009-10-22 | [
"hep-lat",
"cond-mat"
] | P. Butera and M. Comi |
hep-lat/9205026 | Central Charge of the Parallelogram Lattice Strong Coupling Schwinger
Model | We put forth a Fierzed hopping expansion for strong coupling Wilson fermions.
As an application, we show that the strong coupling Schwinger model on
parallelogram lattices with nonbacktracking Wilson fermions span, as a function
of the lattice skewness angle, the $\Delta = -1$ critical line of $6$-vertex
models. This F... | 1992-05-27 | 2009-10-22 | [
"hep-lat",
"cond-mat",
"hep-th"
] | Ken Yee |
hep-lat/9205025 | Regularizations, Anomalies and Fermion Number Non-Conservation in Chiral
Gauge Theories | We study how fermion number conservation fails in fermion number preserving
regularization schemes. We show that the fermion number have to be carried by
the gauge field configurations with non-zero winding number in this scheme and
this fermion number is not conserved in the presence of instantons. We also
consider ot... | 1992-05-27 | 2015-06-25 | [
"hep-lat",
"hep-th"
] | Sinya Aoki |
hep-lat/9205024 | Grand Canonical Partition Function of a 2-dimensional Hubbard Model | We present a new technique for a numerical analysis of the phase structure of
the 2D Hubbard model as a function of the hole chemical potential. The grand
canonical partition function for the model is obtained via Monte Carlo
simulations. The dependence of the hole occupation number on the chemical
potential and the te... | 1992-05-26 | 2009-10-22 | [
"hep-lat"
] | I.M. Barbour and E.G. Klepfish |
hep-lat/9205022 | Parity breaking at high temperature and density | We investigate the question of parity breaking in three-dimensional Euclidean
SU(2) gauge-Higgs theory by Monte Carlo simulations. We observe no sign of
spontaneous parity breaking in the behaviour of both local and non-local gauge
invariant operators. However, the presence of parity odd terms in the action
can induce ... | 1992-05-26 | 2009-10-22 | [
"hep-lat"
] | J. Ambj{\o}rn, K. Farakos and M. E. Shaposhnikov |
hep-lat/9205023 | Mirror fermions in chiral gauge theories | Mirror fermions appear naturally in lattice formulations of the standard
model. The phenomenological limits on their existence and discovery limits at
future colliders are discussed. After an introduction of lattice actions for
chiral Yukawa-models, a recent numerical simulation is presented. In
particular, the emergin... | 1992-05-26 | 2009-10-22 | [
"hep-lat"
] | Istvan Montvay |
hep-lat/9205021 | 3d quantum gravity coupled to matter | We investigate the phase structure of three-dimensional quantum gravity
coupled to an Ising spin system by means of numerical simulations. The quantum
gravity part is modelled by the summation over random simplicial manifolds, and
the Ising spins are located in the center of the tetrahedra, which constitute
the buildin... | 1992-05-26 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | J. Ambjorn, Z. Burda, J. Jurkiewicz, C.F. Kristjansen |
hep-lat/9205020 | Quenched Chiral Logarithms | I develop a diagrammatic method for calculating chiral logarithms in the
quenched approximation. While not rigorous, the method is based on physically
reasonable assumptions, which can be tested by numerical simulations. The main
results are that, at leading order in the chiral expansion, (a) there are no
chiral logari... | 1992-05-25 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Stephen Sharpe |
hep-lat/9205019 | Critical mass in nonzero temperature QCD with staggered fermions | The behaviour of the chiral condensate in QCD is investigated by means of a
study of the distribution of the zeros of the partition function in the complex
quark mass plane. Simulations are performed at fixed temperature on three
different spatial volumes at $\beta=5.04$ and at $\beta=4.9$ and $\beta=5.2$ on
a $4^4$ la... | 1992-05-23 | 2009-10-22 | [
"hep-lat"
] | I.M. Barbour, A. J. Bell and E.G. Klepfish |
hep-lat/9205018 | Simulated Tempering: A New Monte Carlo Scheme | We propose a new global optimization method ({\em Simulated Tempering}) for
simulating effectively a system with a rough free energy landscape (i.e. many
coexisting states) at finite non-zero temperature. This method is related to
simulated annealing, but here the temperature becomes a dynamic variable, and
the system ... | 1992-05-22 | 2010-12-17 | [
"hep-lat",
"cond-mat",
"hep-ph",
"hep-th"
] | Enzo Marinari and Giorgio Parisi |
hep-lat/9205017 | The Quantized $O(1,2)/O(2)\times Z_2$ Sigma Model Has No Continuum Limit
in Four Dimensions. II. Lattice Simulation | A lattice formulation of the $O(1,2)/O(2)\times Z_2$ sigma model is
developed, based on the continuum theory presented in the preceding paper.
Special attention is given to choosing a lattice action (the ``geodesic''
action) that is appropriate for fields having noncompact curved configuration
spaces. A consistent cont... | 1992-05-22 | 2009-10-09 | [
"hep-lat"
] | Jorge de Lyra, Bryce DeWitt, See Kit Foong, Timothy Gallivan, Rob
Harrington, Arie Kapulkin, Eric Myers and Joeseph Polchinski |
hep-lat/9205015 | Chiral Limit of Nucleon Lattice Electromagnetic Form Factors | We calculate electric and magnetic form factors of protons and neutrons in
quenched Monte Carlo lattice QCD on a $16^3\times 24$ lattice at $\beta = 6.0$
using Wilson fermions. We employ a method which characterizes one of the
nucleon fields as a fixed zero-momentum secondary source. Extrapolating the
overall data set ... | 1992-05-21 | 2008-11-26 | [
"hep-lat"
] | Walter Wilcox, Terrence Draper and Keh-Fei Liu |
hep-lat/9205014 | The Quantized $O(1,2)/O(2)\times Z_2$ Sigma Model Has No Continuum Limit
in Four Dimensions. I. Theoretical Framework | The nonlinear sigma model for which the field takes its values in the coset
space $O(1,2)/O(2)\times Z_2$ is similar to quantum gravity in being
perturbatively nonrenormalizable and having a noncompact curved configuration
space. It is therefore a good model for testing nonperturbative methods that
may be useful in qua... | 1992-05-21 | 2009-10-09 | [
"hep-lat",
"hep-th"
] | Jorge de Lyra, Bryce DeWitt, See Kit Foong, Timothy Gallivan, Rob
Harrington, Arie Kapulkin, Eric Myers and Joseph Polchinski |
hep-lat/9205016 | Quenched Hadrons using Wilson and O(a)-Improved Fermion Actions at
beta=6.2 | We present the first study of the light hadron spectrum and decay constants
for quenched QCD using an O(a)-improved nearest-neighbour Wilson fermion action
at \beta=6.2. We compare the results with those obtained using the standard
Wilson fermion action, on the same set of 18 gauge field configurations of a
24^3 times ... | 1992-05-21 | 2011-02-19 | [
"hep-lat"
] | The UKQCD Collaboration: C.R. Allton, H. Duong, C.T. Sachrajda, R.M.
Baxter, S.P. Booth, K.C. Bowler, S. Collins, D.S. Henty, R.D. Kenway, C.
McNeile, B.J. Pendleton, D.G. Richards, J.N. Simone, A.D. Simpson, B.E.
Wilkes, A. Hulsebos, A.C. Irving, A. McKerrell, C. Michael, M. Prisznyak,
P.W. Stephenson, G. Mart... |
hep-lat/9205013 | Effective Field Theories | Effective field theories encode the predictions of a quantum field theory at
low energy. The effective theory has a fairly low ultraviolet cutoff. As a
result, loop corrections are small, at least if the effective action contains a
term which is quadratic in the fields, and physical predictions can be read
straight fro... | 1992-05-19 | 2015-06-25 | [
"hep-lat",
"hep-th"
] | G.Mack, T.Kalkreuter, G.Palma, and M.Speh |
hep-lat/9205011 | Tunneling and Energy Splitting in Ising Models | The energy splitting $E_{0a}$ in two and four dimensional Ising models is
measured in a cylindrical geometry on finite lattices. By comparing to exact
results in the two dimensional Ising model we demonstrate that $E_{0a}$ can be
extracted very reliably from Monte Carlo calculations in practice. In four
dimensions we c... | 1992-05-18 | 2009-10-22 | [
"hep-lat"
] | Karl Jansen and Yue Shen |
hep-lat/9205012 | Reflection positive formulation of chiral gauge theories on a lattice | Gauge invariant chiral theories satisfying the reflection positivity is
constructed on a lattice. This requires the introduction of "half gauge fields"
defined some time ago by Brydges, Fr\"{o}hlich, and Seiler \cite{BFS}. A
two-dimensional model is considered in some detail. | 1992-05-18 | 2009-10-22 | [
"hep-lat"
] | Sergei V. Zenkin |
hep-lat/9205010 | The Running Coupling from Lattice Gauge Theory | From an accurate determination of the inter-quark potential, one can study
the running coupling constant for a range of $R$-values and hence estimate the
scale $\Lambda_{\msbar} $. Detailed results are presented for $SU(2)$ pure
gauge theory to illustrate the method. | 1992-05-14 | 2008-11-26 | [
"hep-lat"
] | Chris Michael (University of Liverpool, Liverpool, UK) |
hep-lat/9205009 | Ising Model Coupled to Three-Dimensional Quantum Gravity | We have performed Monte Carlo simulations of the Ising model coupled to
three-dimensional quantum gravity based on a summation over dynamical
triangulations. These were done both in the microcanonical ensemble, with the
number of points in the triangulation and the number of Ising spins fixed, and
in the grand canoncal... | 1992-05-09 | 2009-10-22 | [
"hep-lat"
] | C.F. Baillie |
hep-lat/9205008 | Dynamics of Langevin Simulation | This chapter [of a supplement to Prog. Theo. Phys.] reviews numerical
simulations of quantum field theories based on stochastic quantization and the
Langevin equation. The topics discussed include renormalization of finite
step-size algorithms, Fourier acceleration, and the relation of the Langevin
equation to hybrid s... | 1992-05-08 | 2008-11-26 | [
"hep-lat"
] | A.S. Kronfeld |
hep-lat/9205006 | Rigorous QCD Predictions for Decays of P-Wave Quarkonia | Rigorous QCD predictions for decay rates of the P-wave states of heavy
quarkonia are presented. They are based on a new factorization theorem which is
valid to leading order in the heavy quark velocity and to all orders in the
running coupling constant of QCD. The decay rates for all four P states into
light hadronic o... | 1992-05-07 | 2010-11-01 | [
"hep-lat",
"hep-ph"
] | Geoffrey T. Bodwin, Eric Braaten, G. Peter Lepage |
hep-lat/9205007 | Improved Nonrelativistic QCD for Heavy Quark Physics | We construct an improved version of nonrelativistic QCD for use in lattice
simulations of heavy quark physics, with the goal of reducing systematic errors
from all sources to below 10\%. We develop power counting rules to assess the
importance of the various operators in the action and compute all leading order
correct... | 1992-05-07 | 2010-11-01 | [
"hep-lat"
] | G. P. Lepage, L. Magnea, C. Nakhleh, U. Magnea, K. Hornbostel |
hep-lat/9205005 | Wolff-Type Embedding Algorithms for General Nonlinear $\sigma$-Models | We study a class of Monte Carlo algorithms for the nonlinear $\sigma$-model,
based on a Wolff-type embedding of Ising spins into the target manifold $M$. We
argue heuristically that, at least for an asymptotically free model, such an
algorithm can have dynamic critical exponent $z \ll 2$ only if the embedding is
based ... | 1992-05-04 | 2009-10-22 | [
"hep-lat"
] | Sergio Caracciolo, Robert G. Edwards, Andrea Pelissetto, Alan D. Sokal |
hep-lat/9205004 | Spontaneous symmetry breaking on the lattice generated by Yukawa
interaction | We study by numerical simulation a lattice Yukawa model with naive fermions
at intermediate values of the Yukawa coupling $y$ when the nearest neighbour
coupling $\kp$ of the scalar field $\Phi$ is very weakly ferromagnetic ($\kp
\approx 0$) or even antiferromagnetic ($\kappa < 0$) and the nonvanishing value
of $\vev$ ... | 1992-05-03 | 2009-10-22 | [
"hep-lat"
] | Wolfgang Bock, Asit K. De, Christoph Frick, Jiri Jers\'ak and Thomas
Trappenberg |
hep-lat/9205002 | Chiral Invariance and Species Doublers in Generic Fermion Models on the
Lattice | Discussions are made on the structures of chirally invariant lattice actions
without any restriction of hermiticity. With the help of the Ward-Takahashi
identity a general conclusion can be derived that there must be species
doublers in any chirally invariant model provided that the model is chosen as
well-regularized,... | 1992-05-01 | 2015-06-25 | [
"hep-lat"
] | Koichi Funakubo and Taro Kashiwa |
hep-lat/9205003 | Non--perturbative bounds on the Higgs mass in the minimal standard model | This is a slightly extended version of the talk delivered at the Topical
Workshop ``Non perturbative aspects of chiral gauge theories'', Accademia
Nazionale dei Lincei, Roma, 9-11 March, 1992. Abstract: The Higgs mass in the
minimal standard model is bounded by triviality and vacuum stability in the
range 50--100 $GeV$... | 1992-05-01 | 2009-10-22 | [
"hep-lat"
] | Herbert Neuberger |
hep-lat/9205001 | Scaling topological charge in the CP^3 spin model | The CP^3 spin model is simulated at large correlation lengths in two
dimensions. An overrelaxation algorithm is employed which yields reduced
critical slowing down with dynamical exponents z around unity. We compare our
results with recent multigrid data on the massgap m and the spin susceptibility
and confirm the abse... | 1992-05-01 | 2009-10-22 | [
"hep-lat"
] | Ulli Wolff (CERN) |
hep-lat/9204016 | Acceptance Rates in Multigrid Monte Carlo | An approximation formula is derived for acceptance rates of nonlocal
Metropolis updates in simulations of lattice field theories. The predictions of
the formula agree quite well with Monte Carlo simulations of 2-dimensional Sine
Gordon, XY and phi**4 models. The results are consistent with the following
rule: For a cri... | 1992-04-30 | 2009-12-30 | [
"hep-lat"
] | M.Grabenstein and K.Pinn |
hep-lat/9204017 | Decoupling a Fermion Whose Mass Comes from a Yukawa Coupling:
Nonperturbative Considerations | Perturbative analyses seem to suggest that fermions whose mass comes solely
from a Yukawa coupling to a scalar field can be made arbitrarily heavy, while
the scalar remains light. The effects of the fermion can be summarized by a
local effective Lagrangian for the light degrees of freedom. Using weak
coupling and large... | 1992-04-29 | 2011-04-20 | [
"hep-lat",
"hep-ph"
] | T. Banks, A. Dabholkar |
hep-lat/9204015 | Blockspin Cluster Algorithms for Quantum Spin Systems | Cluster algorithms are developed for simulating quantum spin systems like the
one- and two-dimensional Heisenberg ferro- and anti-ferromagnets. The
corresponding two- and three-dimensional classical spin models with four-spin
couplings are maped to blockspin models with two-blockspin interactions.
Clusters of blockspin... | 1992-04-28 | 2019-06-05 | [
"hep-lat"
] | U.-J. Wiese and H.-P. Ying |
hep-lat/9204014 | Multigrid Methods in Lattice Field Computations | The multigrid methodology is reviewed. By integrating numerical processes at
all scales of a problem, it seeks to perform various computational tasks at a
cost that rises as slowly as possible as a function of $n$, the number of
degrees of freedom in the problem. Current and potential benefits for lattice
field computa... | 1992-04-27 | 2009-10-22 | [
"hep-lat"
] | Achi Brandt |
hep-lat/9204013 | The Free Energy of Spherical Bubbles in Lattice SU(3) Gauge Theory | We study the coefficients of the expansion $F(R) = 1/3 c_3 R^3 + 1/2 c_2 R^2
+ c_1 R$ of the free energy of spherical bubbles at $T=T_c$ in pure glue QCD
using lattice Monte Carlo techniques. The coefficient $c_3$ vanishes at $T=T_c$
and our results suggest that the sign and the order of magnitude of $c_1$ is in
agreem... | 1992-04-23 | 2009-10-22 | [
"hep-lat"
] | K. Kajantie, Leo Karkkainen, K. Rummukainen |
hep-lat/9204011 | Phenomenology with Wilson fermions using smeared sources | We investigate the use of two types of non-local (``smeared'') sources for
quark propagators in quenched lattice QCD at $\beta=6.0$ using Wilson fermions
at $\kappa=0.154$ and $0.155$. We present results for the hadron mass spectrum,
meson decay constants, quark masses, the chiral condensate and the quark
distribution ... | 1992-04-22 | 2014-11-17 | [
"hep-lat"
] | D. Daniel, R. Gupta, G. Kilcup, A. Patel and S. Sharpe |
hep-lat/9204010 | Influence of the Measure on Simplicial Quantum Gravity in Four
Dimensions | We investigate the influence of the measure in the path integral for
Euclidean quantum gravity in four dimensions within the Regge calculus. The
action is bounded without additional terms by fixing the average lattice
spacing. We set the length scale by a parameter $\beta$ and consider a scale
invariant and a uniform m... | 1992-04-22 | 2016-08-31 | [
"hep-lat"
] | W. Beirl, E. Gerstenmayer, H. Markum |
hep-lat/9204012 | Scalar and axial matrix elements of the nucleon: sea quark content | Sea quark contributions to the scalar density and the axial current matrix
elements of the nucleon are studied in lattice qcd with two flavours of
dynamical wilson fermions. the results are compared to trends in heavy quark
mass expansions, and contrasted with the numbers obtained using dynamical
staggered fermions. | 1992-04-22 | 2010-11-01 | [
"hep-lat"
] | Apoorva Patel |
hep-lat/9204008 | Hadron Spectrum in QCD with Valence Wilson Fermions and Dynamical
Staggered Fermions at $6/g^2=5.6 | We present an analysis of hadronic spectroscopy for Wilson valence quarks
with dynamical staggered fermions at lattice coupling $6/g^2 = \beta=5.6$ at
sea quark mass $am_q=0.01$ and 0.025, and of Wilson valence quarks in quenched
approximation at $\beta=5.85$ and 5.95, both on $16^3 \times 32$ lattices. We
make compari... | 1992-04-21 | 2009-10-22 | [
"hep-lat"
] | K.M. Bitar, T.A. DeGrand, R.G. Edwards, S. Gottlieb, U.M. Heller, A.D.
Kennedy, J.B. Kogut, A. Krasnitz, W. Liu, M.C. Ogilvie, R.L. Renken, P.
Rossi, D.K. Sinclair, R.L. Sugar, D. Toussaint, K.C. Wang |
hep-lat/9204009 | Spectrum of Relativistic Fermions in a 2d Doped Lattice | Motivated by some previous work on fermions on random lattices and by
suggestions that impurities could trigger parity breaking in 2d crystals, we
have analyzed the spectrum of the Dirac equation on a two dimensional square
lattice where sites have been removed randomly --- a doped lattice. We have
found that the syste... | 1992-04-21 | 2009-10-22 | [
"hep-lat"
] | D. Espriu and J. Matias |
hep-lat/9204007 | Chiral Perturbation Theory for the Quenched Approximation of QCD | [This version is a minor revision of a previously submitted preprint. Only
references have been changed.] We describe a technique for constructing the
effective chiral theory for quenched QCD. The effective theory which results is
a lagrangian one, with a graded symmetry group which mixes Goldstone bosons and
fermions,... | 1992-04-17 | 2009-10-22 | [
"hep-lat"
] | Claude Bernard and Maarten Golterman |
hep-lat/9204005 | Microcanonical cluster algorithms | I propose a numerical simulation algorithm for statistical systems which
combines a microcanonical transfer of energy with global changes in clusters of
spins. The advantages of the cluster approach near a critical point augment the
speed increases associated with multi-spin coding in the microcanonical
approach. The m... | 1992-04-16 | 2009-10-22 | [
"hep-lat"
] | Michael Creutz |
hep-lat/9204006 | Point-Split Lattice Operators for B Decays | The matrix element which determines the B meson decay constant can be
measured on the lattice using an effective field theory for heavy quarks.
Various discretizations of the heavy-light bilinears which appear in this and
other B decay matrix elements are possible. The heavy-light bilinear currently
used for the determ... | 1992-04-16 | 2010-11-01 | [
"hep-lat"
] | Oscar F. Hernandez and Brian R. Hill |
hep-lat/9204002 | A Numerical Test of KPZ Scaling: Potts Models Coupled to Two-Dimensional
Quantum Gravity | We perform Monte Carlo simulations using the Wolff cluster algorithm of the
q=2 (Ising), 3, 4 and q=10 Potts models on dynamical phi-cubed graphs of
spherical topology with up to 5000 nodes. We find that the measured critical
exponents are in reasonable agreement with those from the exact solution of the
Ising model an... | 1992-04-13 | 2015-06-25 | [
"hep-lat"
] | C.F. Baillie (Colorado) and D. A. Johnston (Heriot Watt) |
hep-lat/9204003 | Multiple Potts Models Coupled to Two-Dimensional Quantum Gravity | We perform Monte Carlo simulations using the Wolff cluster algorithm of {\it
multiple} $q=2,3,4$ state Potts models on dynamical phi-cubed graphs of
spherical topology in order to investigate the $c>1$ region of two-dimensional
quantum gravity. Contrary to naive expectation we find no obvious signs of
pathological beha... | 1992-04-13 | 2009-10-22 | [
"hep-lat"
] | C.F. Baillie (Colorado) and D. A. Johnston (Heriot Watt) |
hep-lat/9204004 | Critical Behavior of Dynamically Triangulated Quantum Gravity in Four
Dimensions | We performed detailed study of the phase transition region in Four
Dimensional Simplicial Quantum Gravity, using the dynamical triangulation
approach. The phase transition between the Gravity and
Antigravity phases turned out to be asymmetrical, so that we observed the
scaling laws only when the Newton constant app... | 1992-04-13 | 2009-10-22 | [
"hep-lat"
] | M.E. Agishtein, A.A. Migdal |
hep-lat/9201001 | Monte Carlo Simulations of Higgs-Fermion Systems | To gain understanding of the Higgs-fermion sector of the standard model, we
study the one-component $Z_2$ symmetric and the four-component O(4) symmetric
scalar models coupled to staggered fermions using the hybrid Monte Carlo
algorithm. We map out the phase diagrams, and show that the $Z_2$ model has a
tree level pert... | 1992-04-08 | 2007-05-23 | [
"hep-lat"
] | Jonas Berlin |
hep-lat/9203002 | Multimagnetical Simulations | We modified the recently proposed multicanonical MC algorithm for the case of
a magnetic field driven order--order phase transition. We test this {\it
multimagnetic} Monte Carlo algorithm for the D=2 Ising model at $\beta=0.5$ and
simulate square lattices up to size $100 \times 100$. On these lattices with
periodic bou... | 1992-04-08 | 2007-05-23 | [
"hep-lat"
] | U. Hansmann, B.A. Berg and T. Neuhaus |
hep-lat/9112001 | Vectorized Cluster Search | Contrary to conventional wisdom, the construction of clusters on a lattice
can easily be vectorized, namely over each ``generation'' in a breadth first
search. This applies directly to, e.g., the {\it single cluster} variant of the
Swendsen-Wang algorithm. On a Cray Y-MP, total CPU time was reduced by a factor
3.5 -- 7... | 1992-04-08 | 2007-05-23 | [
"hep-lat"
] | Hans Gerd Evertz |
hep-lat/9201004 | How to Put a Heavier Higgs on the Lattice | The cutoff dependence of the Scalar Sector of the Minimal Standard Model can
result in an increase of the existing triviality bound estimates of the Higgs
mass. We present a large $N$ calculation and some preliminary N=4 results that
suggest that the increase can be as large as 30%, resulting to a bound of about
850 G ... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | U.M. Heller, M. Klomfass, H. Neuberger, and P. Vranas |
hep-lat/9204001 | A New Approach to Spin Glass Simulations | We present a recursive procedure to calculate the parameters of the recently
introduced multicanonical ensemble and explore the approach for spin glasses.
Temperature dependence of the energy, the entropy and other physical quantities
are easily calculable and we report results for the zero temperature limit. Our
data ... | 1992-04-08 | 2009-01-23 | [
"hep-lat"
] | Bernd A. Berg and Tarik Celik |
hep-lat/9202004 | Multicanonical Ensemble: A New Approach to Simulate First-order Phase
Transitions | Relying on the recently proposed multicanonical algorithm, we present a
numerical simulation of the first order phase transition in the 2d 10-state
Potts model on lattices up to sizes $100\times100$. It is demonstrated that the
new algorithm $lacks$ an exponentially fast increase of the tunneling time
between metastabl... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | B.A. Berg and T. Neuhaus |
hep-lat/9107002 | Spectral Density Study of the SU(3) Deconfining Phase Transition | We present spectral density reweighting techniques adapted to the analysis of
a time series of data with a continuous range of allowed values. In a first
application we analyze action and Polyakov line data from a Monte Carlo
simulation on $L_t L^3 (L_t=2,4)$ lattices for the SU(3) deconfining phase
transition. We calc... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | Nelsons A. Alves, Bernd Al. Berg and Sergiu Sanielevici |
hep-lat/9201007 | On the Dynamics of Light Wilson Quarks | We describe recent results obtained as part of the High Energy Monte Carlo
Grand Challenge (HEMCGC) project concerning the behaviour of lattice QCD with
light dynamical Wilson quarks. We show that it is possible to reach regions of
parameter space with light pions $m_\pi\ll0.2/a$, but that the equilibration
time for su... | 1992-04-08 | 2007-05-23 | [
"hep-lat"
] | A.D. Kennedy and R.G. Edwards |
hep-lat/9201005 | QCD Hadron Spectroscopy with Staggered Dynamical Quarks at $\beta = 5.6$ | We present preliminary results from the 1991 HEMCGC simulations with
staggered dynamical fermions on a $16^3 \times 32$ lattice at $\beta = 5.6$
with sea quark masses $am_q = 0.025$ and 0.01. The spectroscopy was done both
for staggered valence quarks with mass equal to the sea quark masses and for
Wilson valence quark... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | K.M. Bitar, R. Edwards, T.A. DeGrand, Steven Gottlieb, U.M. Heller,
A.D. Kennedy, J.B. Kogut, A. Krasnitz, W. Liu, M.C. Ogilvie, R.L. Renken,
D.K. Sinclair, R.L. Sugar, D. Toussaint, and K.C. Wang |
hep-lat/9201002 | A Study of Symmetry Restoration at Finite Temperature in the O(4) Model
Using Anisotropic Lattices | Results of investigations of the O(4) spin model at finite temperature using
anisotropic lattices are presented. In both the large $N$ approximation and the
numerical simulations using the Wolff cluster algorithm we find that the ratio
of the symmetry restoration temperature $T_{\rm SR}$ to the Higgs mass $m_{\rm
H}$ i... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | R.V. Gavai, U.M. Heller, F. Karsch, B. Plache, and T. Neuhaus |
hep-lat/9202002 | Random Walks and the Correlation Length Critical Exponent in Scalar
Quantum Field Theory | The distance scale for a quantum field theory is the correlation length
$\xi$, which diverges with exponent $\nu$ as the bare mass approaches a
critical value. If $t=m^{2}-m_{c}^{2}$, then $\xi=m_{P}^{-1} \sim t^{-\nu}$ as
$t \to 0$. The two-point function of a scalar field has a random walk
representation. The walk ta... | 1992-04-08 | 2007-05-23 | [
"hep-lat"
] | Joe Kiskis, Rajamani Narayanan and Pavlos Vranas |
hep-lat/9202001 | Monte Carlo Calculation of the Surface Free Energy for the 2d 7-state
Potts Model, and an Estimate for 4d SU(3) Gauge Theory | Using the recently proposed multicanonical ensemble, we perform Monte Carlo
simulation for the 2d 7-state Potts model and calculate its surface free energy
density (surface tension) to be $2 f^s = 0.0241 \pm 0.0010$. This is an order
of magnitude smaller than other estimates in the recent literature. Relying on
existin... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | Wolfhard Janke, Bernd A. Berg, and Mohammad Katoot |
hep-lat/9202003 | Thermodynamics of Lattice QCD with 2 Light Dynamical (Staggered) Quark
Flavours on a $16^3\times 8$ Lattice | Lattice QCD with 2 light staggered quark flavours is being simulated on a
$16^3\times8$ lattice to study the transition from hadronic matter to a quark
gluon plasma. We have completed runs at $m_q=0.0125$ and are extending this to
$m_q=0.00625$. We also examine the addition of a non-dynamical "strange" quark.
Thermodyn... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | S. Gottlieb, U.M. Heller, A.D. Kennedy, J.B. Kogut, A. Krasnitz, W.
Liu, R.L. Renken, D.K. Sinclair, R.L. Sugar, D. Toussaint and K.C. Wang |
hep-lat/9203001 | Is there a $\rho$ in the O(4) $\lambda \phi^4_4$ theory? | A Monte Carlo simulation of the O(4) $\lambda \phi^4$ theory in the broken
phase is performed on a hypercubic lattice in search of an I=1, J=1 resonance.
The region of the cutoff theory where the interaction is strong is investigated
since it is there that a resonance would be expected to have a better chance to
form. ... | 1992-04-08 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Khalil M. Bitar and Pavlos M. Vranas |
hep-lat/9112002 | Multi-Grid Monte Carlo III. Two-Dimensional O(4)-Symmetric Nonlinear
$\sigma$-Model | We study the dynamic critical behavior of the multi-grid Monte Carlo (MGMC)
algorithm with piecewise-constant interpolation applied to the two-dimensional
O(4)-symmetric nonlinear $\sigma$-model [= SU(2) principal chiral model], on
lattices up to $256 \times 256$. We find a dynamic critical exponent
$z_{int,{\cal M}^2}... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | Robert G. Edwards, Sabino Jos\'e Ferreira, Jonathan Goodman, Alan D.
Sokal |
hep-lat/9201006 | Path Integrals and Voronin's Theorem on the Universality of the Riemann
Zeta Function | We explore a new approach to the path integral for a latticized quantum
theory. This talk is based on work with N. Khuri and H. Ren. | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | Khalil M. Bitar |
hep-lat/9201003 | Dynamic Critical Behaviour of Wolff's Algorithm for $RP^N$
$\sigma$-Models | We study the performance of a Wolff-type embedding algorithm for $RP^N$
$\sigma$-models. We find that the algorithm in which we update the embedded
Ising model \`a la Swendsen-Wang has critical slowing-down as $z_\chi \approx
1$. If instead we update the Ising spins with a perfect algorithm which at
every iteration pro... | 1992-04-08 | 2011-08-05 | [
"hep-lat"
] | S. Caracciolo, R.G. Edwards, A. Pelissetto, and A.D. Sokal |
hep-lat/9107001 | How to Put a Heavier Higgs on the Lattice | Lattice work, exploring the Higgs mass triviality bound, seems to indicate
that a strongly interacting scalar sector in the minimal standard model cannot
exist while low energy QCD phenomenology seems to indicate that it could. We
attack this puzzle using the 1/N expansion and discover a simple criterion for
selecting ... | 1992-04-08 | 2009-10-22 | [
"hep-lat"
] | U.M. Heller, H. Neuberger and P. Vranas |
hep-ph/9212316 | Paradoxes in Strange Quark Contributions to Hyperon Spins | Data for magnetic moments and semileptonic decays show disagreements between
experimental values and theoretical predictions not easily explained by simple
models for $\Lambda$ and $\Sigma$ hyperons. | 1992-12-31 | 2007-05-23 | [
"hep-ph"
] | Harry J. Lipkin |
hep-ph/9212317 | A Signal for Technicolor? | We propose an interpretation for the ($l\bar l\gamma \gamma ,\ M_{\gamma
\gamma }=60{\rm GeV}$) events, which have recently been reported by L3 group at
LEP. This may be a first signal of `Technicolor' theory. | 1992-12-31 | 2015-06-25 | [
"hep-ph"
] | Masako Bando and Nobuhiro Maekawa |
hep-ph/9212318 | Planck-Scale Physics and Solutions to the Strong CP Problem without
Axion | We analyse the impact of quantum gravity on the possible solutions to the
strong CP problem which utilize the spontaneously broken discrete symmetries,
such as parity and time reversal invariance. We find that the stability of the
solution under Planck scale effects provides an upper limit on the scale
$\Lambda$ of rel... | 1992-12-31 | 2010-11-01 | [
"hep-ph"
] | Z.G.Berezhiani, R.N.Mohapatra and G.Senjanovic |
hep-ph/9212315 | Chiral Perturbation Theory for $B \rightarrow D^*$ and $B \rightarrow D$
Semileptonic Transition Matrix Elements at Zero Recoil | Heavy quark symmetry predicts the value of $B \rightarrow D$ and $B
\rightarrow D^*$ transition matrix elements of the current $\bar c \gamma_\mu
(1 - \gamma_5)b$, at zero recoil (where in the rest frame of the $B$ the $D$ or
$D^*$ is also at rest). We use chiral perturbation theory to compute the
leading corrections t... | 1992-12-30 | 2009-09-15 | [
"hep-ph"
] | L. Randall and M. B. Wise |
hep-ph/9212314 | On the 545 keV Line in the Spectrum of the Crab Nebula | The GRANAT group (R. Sunyaev {\it et al.\/}, Central Bureau of Astronomical
Telegrams, International Astronomical Union, Circular No.~5481) recently
reported the observation of a $(545 \pm 11)$ keV line in the spectrum of the
Crab Nebula. It is tempting to associate this with the positron-electron
annihilation line at ... | 1992-12-30 | 2007-05-23 | [
"hep-ph"
] | Myron Bander and H. R. Rubinstein |
hep-ph/9212313 | Dynamical CP Violation in Composite Higgs Models | The dynamical origin of the CP violation in electroweak theory is
investigated in composite Higgs models. The mechanism of the spontaneous CP
violation proposed in other context by Dashen is adopted to construct simple
models of the dynamical CP violation.
Within the models the size of the neutron electric dipole mom... | 1992-12-28 | 2010-11-01 | [
"hep-ph"
] | S.Hashimoto, T.Inagaki, T.Muta |
hep-ph/9212312 | Measuring the Beam Polarizations and the Luminosity at Photon-Photon
Colliders | We present methods to measure the beam polarizations and the luminosity of
$\gamma \gamma$ colliders at TeV energy scale.
The beam polarizations of a $\gamma \gamma$ collider can easily be monitored
by comparing the numbers of events of the processes $\gamma \gamma$
$\rightarrow$ $\ell^+ \ell^-$ and $\gamma \gamma$ $... | 1992-12-28 | 2011-07-19 | [
"hep-ph"
] | Y. Yasui, I. Watanabe, J. Kodaira and I. Endo |
hep-ph/9212311 | An Orbifold Compactification with Three Families from Twisted Sectors | We obtain a three generational $SU(3)_c\times SU(3)_w \times U(1)^4\times
[SO(12)\times U(1)^2]^\prime$ model from an orbifold construction with the
requirement that three generations arise from twisted sectors. There exist
supersymmetric vacua realizing the standard model. In one example the anomalous
$U(1)$ breaks th... | 1992-12-26 | 2009-10-22 | [
"hep-ph"
] | Hang Bae Kim and Jihn E. Kim |
hep-ph/9212310 | Gluon Condensates, Chiral Symmetry Breaking and Pion Wave Function | We consider here chiral symmetry breaking in quantum chromodynamics arising
from gluon condensates in vacuum. Through coherent states of gluons simulating
a mean field type of approximation, we show that the off-shell gluon
condensates of vacuum generate a mass-like contribution for the quarks, giving
rise to chiral sy... | 1992-12-25 | 2009-10-22 | [
"hep-ph"
] | A. Mishra and S.P. Misra |
hep-ph/9212308 | Dimensionally Regulated One-Loop Integrals | We describe methods for evaluating one-loop integrals in $4-2\e$ dimensions.
We give a recursion relation that expresses the scalar $n$-point integral as a
cyclicly symmetric combination of $(n-1)$-point integrals. The computation of
such integrals thus reduces to the calculation of box diagrams ($n=4$). The
tensor int... | 1992-12-24 | 2008-11-26 | [
"hep-ph",
"hep-th"
] | Z. Bern, L. Dixon and D.A. Kosower |
hep-ph/9212307 | The Equivalence Theorem and Global Anomalies | In the presence of some forms of global anomalies, the equivalence theorem,
which relates the interactions of longitudinal gauge bosons to those of the
Goldstone bosons, is not always valid. This can occur when the Goldstone sector
contains an anomaly which is canceled in the gauge currents by the effects of a
differen... | 1992-12-23 | 2009-10-22 | [
"hep-ph"
] | John F. Donoghue and Jusak Tandean |
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