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/9311054 | Alpha_s from the Lattice Potential | We present an extensive study on the direct determination of the running
coupling alpha_s from the static quark antiquark force at short distances, in
quenched QCD. We find from our high statistics potential analysis that alpha_qq
exhibits two-loop asymptotic behaviour for momenta as low as .5 GeV. As a
result, we dete... | 1993-11-29 | 2011-07-19 | [
"hep-lat"
] | K. Schilling, G.S. Bali |
hep-lat/9311055 | The analysis of Polyakov loop and spin correlators in finite volumes | We derive an analytic expression for point to point correlation functions of
the Polyakov loop based on the transfer matrix formalism. The contributions
from the eigenvalues of the transfer matrix including and beyond the mass gap
are investigated both for the $2d$ Ising model and in finite temperature
$SU(2)$ gauge th... | 1993-11-29 | 2009-10-22 | [
"hep-lat"
] | J. Engels, V. K. Mitrjushkin and T. Neuhaus |
hep-lat/9311051 | High statistics calculations of quenched QCD spectrum using various
quark sources | We present the results for the hadron spectrum calculated on 400
configurations using point source, wall source and 8-cubic sources, in quenched
QCD with Wilson fermions at $\beta=6.0$ and $K=0.155$ on a $24^3 \times 54$
lattice. The results for the ground state masses obtained with three types of
quark sources agree w... | 1993-11-29 | 2009-10-22 | [
"hep-lat"
] | QCDPAX collaboration: Y.Iwasaki, K.Kanaya, S.Sakai, T.Yoshie,
T.Hoshino and T.Shirakawa |
hep-lat/9311058 | Status of the Higgs Mass Bound | The status of the triviality bound of the Higgs mass in the Minimal Standard
Model is reviewed. It is emphasized that the bound is obtained, in the scalar
sector, by limiting cutoff effects on physical processes. Results from several
regularization schemes, including actions that allow a parameterization and
tuning of ... | 1993-11-29 | 2009-10-22 | [
"hep-lat"
] | Urs M. Heller |
hep-lat/9311052 | Topological charge density around static color sources | We analyze the topological structure of quenched QCD in the presence of
static color sources. Distributions of the topological charge density around
static quarks and mesons are computed in both phases of QCD. We observe a
suppression of topological fluctuations in the vicinity of external sources. In
the confinement p... | 1993-11-29 | 2008-11-26 | [
"hep-lat"
] | Manfried Faber, Harald Markum, Stefan Olejnik and Wolfgang Sakuler |
hep-lat/9311049 | Finite-Size Effect of Hadron Masses with Kogut-Susskind Quarks | We present numerical results and their analyses of finite-size effects of
hadron masses for both quenched and full QCD calculations. We show that they
are much larger for full QCD due to dynamical sea quarks and the associated
breaking of $Z(3)$ symmetry. We also argue that finite-size effects are
non-negligible even f... | 1993-11-29 | 2009-10-22 | [
"hep-lat"
] | S. Aoki, T. Umemura, M. Fukugita, N. Ishizuka, H. Mino, M Okawa, and
A. Ukawa |
hep-lat/9311056 | QCD correlation functions and instantons | QCD point-to-point correlation functions at distances .2-1 fm are very
different for different channels, and they tell us a lot about inter-quark
interactions. Recent studies based on experimental data, 'instanton liquid'
approach and lattice measurements are reviewed. Agreement between all of them
show that instanton-... | 1993-11-29 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | E.Shuryak (Physics Department, State University of New York, Stony
Brook NY, USA) |
hep-lat/9311050 | Sea Quark Effects on the Strong Coupling Constant | We present results showing that the strong coupling constant measured in
two-flavor full QCD with dynamical Kogut-Susskind quarks at $\beta=5.7$ exhibit
a 15\% increase due to sea quarks over that for quenched QCD at the scale
$\mu\approx 7$GeV . (talk at lattice93) | 1993-11-29 | 2009-10-22 | [
"hep-lat"
] | T. Onogi, S. Aoki, M. Fukugita, S. Hashimoto, N. Ishizuka, H. Mino,
M.Okawa, and A. Ukawa |
hep-lat/9311059 | Simple Matrix Elements with Dynamical Fermions | We report on studies of simple matrix elements from simulations with two
flavors of sea quarks, both staggered and Wilson. We show the decay constants
of vector and pseudoscalar mesons. The effects of sea quarks are small. These
simulations are done at relatively large lattice spacing compared to most
quenched studies. | 1993-11-29 | 2015-06-25 | [
"hep-lat"
] | The High Energy Monte Carlo Grand Challenge |
hep-lat/9311048 | Some Interesting Features of Noncompact QED_3 | We study the phase diagram of non compact $QED_3$ using the $MFA$ method and
present evidence for a continuous phase transition line at small $N_f$. We also
analyze the chiral structure of the vacuum by means of the computation of the
probability distribution function of the order parameter in the exact chiral
limit. | 1993-11-27 | 2009-10-22 | [
"hep-lat"
] | V. Azcoiti, G. Di Carlo, A. Galante, A.F. Grillo, V. Laliena, X.Q. Luo
and C.E. Piedrafita |
hep-lat/9311045 | Lattice Computation of a Magnetic Monopole Mass | A single magnetic monopole in pure SU(2) gauge theory is simulated on the
lattice and its mass is computed in the full quantum theory. The results are
relevant for our proposed realization of the dual superconductor hypothesis of
confinement. | 1993-11-26 | 2011-04-20 | [
"hep-lat"
] | J. Smit and A.J. van der Sijs |
hep-lat/9311046 | Computing the Mass of a Magnetic Monopole in SU(2) Gauge Theory | A single magnetic monopole in pure SU(2) gauge theory is simulated on the
lattice and its mass is computed in the full quantum theory. The results are
relevant for our proposed realization of the dual superconductor hypothesis of
confinement. | 1993-11-26 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | J. Smit and A.J. van der Sijs |
hep-lat/9311041 | Quantum chromodynamics with various number of flavors | The phase structure of QCD with various number of flavors is studied for
Wilson quarks. For the case of $N_F=3$ we find that the finite temperature
deconfining transition is of first order in the chiral limit on an $N_t=4$
lattice. Together with our previous results that the deconfining transition in
the chiral limit i... | 1993-11-26 | 2016-08-14 | [
"hep-lat"
] | Y. Iwasaki, K. Kanaya, S. Sakai and T. Yoshi\'e |
hep-lat/9311042 | The Behavior of Vortex Loops in the 3-d XY Model | The behavior of vortex loops is studied in the 3-d XY model. It is found that
the phase transtiton of the 3-d XY model is caused by percolating vortex loops. | 1993-11-26 | 2009-10-22 | [
"hep-lat"
] | Arjan Hulsebos |
hep-lat/9311043 | Quenched Heavy-Light Decay Constants | We present decay constants from a quenched simulation using both propagating
quarks and the static theory at $\beta=6.2$ on $24^3\times48$. The results
using propagating quarks are used to test scaling laws predicted by the heavy
quark symmetry. | 1993-11-26 | 2010-11-01 | [
"hep-lat"
] | Hartmut Wittig, UKQCD Collaboration |
hep-lat/9311044 | New Method for Dynamical Fermions and Chiral-Symmetry Breaking | The reasons for the feasibility of the Microcanonical Fermionic Average
($MFA$) approach to lattice gauge theory with dynamical fermions are discussed.
We then present a new exact algorithm, which is free from systematic errors and
convergent even in the chiral limit. | 1993-11-26 | 2009-10-22 | [
"hep-lat"
] | V. Azcoiti, G. Di Carlo, A.F. Grillo, V. Laliena and X.Q. Luo |
hep-lat/9311047 | Scaling in Steiner Random Surfaces | It has been suggested that the modified Steiner action functional has
desirable properties for a random surface action. In this paper we investigate
the scaling of the string tension and massgap in a variant of this action on
dynamically triangulated random surfaces and compare the results with the
gaussian plus extrin... | 1993-11-26 | 2009-10-22 | [
"hep-lat"
] | C.F. Baillie, A. Irback, W. Janke and D.A. Johnston |
hep-lat/9311040 | Topological Features in a Two-Dimensional Higgs Model | Topological properties of the gauge field in a two-dimensional Higgs model
are investigated. Results of exploratory numerical simulations are presented. | 1993-11-25 | 2009-10-22 | [
"hep-lat"
] | Istvan Montvay |
hep-lat/9311039 | A lattice calculation of the branching ratio for $\overline{B}
\rightarrow K^* \gamma$ | Preliminary results are presented on the calculation of the relevant form
factor for the radiative decay $\overline{B} \rightarrow K^* \gamma$ We find
that the form factor is weakly dependent on the spectator quark mass. We
compare the results obtained for a full chiral extrapolation and where this
independence is assu... | 1993-11-24 | 2007-05-23 | [
"hep-lat"
] | Hugh Shanahan, UKQCD Collaboration |
hep-lat/9311037 | Fermion number violation and a two-dimensional Higgs model | The investigation of topological properties of the gauge field in a
two-dimensional Higgs model can help in understanding anomalous fermion number
violation. | 1993-11-24 | 2011-04-15 | [
"hep-lat"
] | Istvan Montvay |
hep-lat/9311038 | A Lattice Study of Spin and Flavour Symmetry in Heavy Quark Physics | We present a first test of heavy quark spin-flavour symmetries in matrix
elements for semi-leptonic decays \bar B to D l\bar\nu and \bar B to D^*
l\bar\nu. We show that O(1/m_Q) corrections are small at masses around the
charm for form factors protected by Luke's Theorem, but are of order 30-40 \%
for h_V and h_V/h_{A_... | 1993-11-24 | 2007-05-23 | [
"hep-lat",
"hep-ph"
] | Henning Hoeber |
hep-lat/9311033 | Running Coupling in SU(3) Yang-Mills Theory | We report about our ongoing computation of running coupling constants in
asymptotically free theories using the recursive finite size scaling technique.
The latest results for the SU(3) Yang-Mills theory are presented. | 1993-11-23 | 2009-10-22 | [
"hep-lat"
] | Ulli Wolff (CERN) |
hep-lat/9311032 | On the top of the energy barrier. Margarita Garcia Perez | We present results related to the search of SU(2) instantons on a geometry
$[0,L]^3\times [0,T]$ obtained using over-improved cooling with fixed boundary
conditions. We also introduce a criterion for finding a sphaleron at the top of
the energy barrier of the instanton path. | 1993-11-23 | 2008-11-26 | [
"hep-lat",
"hep-th"
] | Antonio Gonzalez-Arroyo, Jeroen Snippe and Pierre van Baal |
hep-lat/9311034 | The Improvement Program in Nonrelativistic Lattice QCD | Progress in the improvement program in nonrelativistic lattice QCD is
outlined. The leading radiative corrections to the heavy-quark mass
renormalization, energy shift, and two important kinetic coupling coefficients
are presented. The reliability of tadpole-improved perturbation theory in
determining the energy shift ... | 1993-11-23 | 2010-11-01 | [
"hep-lat"
] | Colin J. Morningstar |
hep-lat/9311036 | Critical Slowing Down of Cluster Algorithms for Ising Models Coupled to
2-d Gravity | We simulate single and multiple Ising models coupled to 2-d gravity using
both the Swendsen-Wang and Wolff algorithms to update the spins. We study the
integrated autocorrelation time and find that there is considerable critical
slowing down, particularly in the magnetization. We argue that this is
primarily due to the... | 1993-11-23 | 2009-10-22 | [
"hep-lat",
"cond-mat"
] | M. Bowick, M. Falcioni, G. Harris and E. Marinari |
hep-lat/9311035 | Induced Chern-Simons term in lattice QCD at finite temperature | The general conditions for the Chern-Simons action to be induced as a
nonuniversal contribution of fermionic determinant are formulated in the finite
temperature lattice QCD. The dependence of the corresponding action coefficient
on nonuniversal parameters (chemical potentials, vacuum features, etc. ) is
explored. Spec... | 1993-11-23 | 2009-10-22 | [
"hep-lat"
] | O.A.Borisenko, V.K.Petrov, G.M.Zinovjev |
hep-lat/9311031 | Wavelets as a variational basis of the XY model | We use Daubechies' orthonormal compact wavelets as a variational basis for
the $XY$ model in two and three dimensions. Assuming that the fluctuations of
the wavelet coefficients are Gaussian and uncorrelated, minimization of the
free energy yields the fluctuation strength of wavelet coefficients at
different scales, fr... | 1993-11-22 | 2009-10-22 | [
"hep-lat"
] | C. Best and A. Schaefer |
hep-lat/9311030 | The First Order Signal in Pure U(1) Gauge Theory May be Fake | We study the deconfinement phase transition of compact $U(1)$ pure lattice
gauge theory with the Wilson action on {\em closed topology} lattices. In
contrast to studies of compact QED on {\em hypercubic lattices with periodic
boundary conditions}, we find no metastability signal at the phase transition
on the lattices ... | 1993-11-22 | 2009-10-22 | [
"hep-lat"
] | C.B. Lang and T. Neuhaus |
hep-lat/9311029 | Scaling and Density of Lee-Yang Zeroes in the Four Dimensional Ising
Model | The scaling behaviour of the edge of the Lee--Yang zeroes in the four
dimensional Ising model is analyzed. This model is believed to belong to the
same universality class as the $\phi^4_4$ model which plays a central role in
relativistic quantum field theory. While in the thermodynamic limit the scaling
of the Yang--Le... | 1993-11-20 | 2011-07-19 | [
"hep-lat"
] | R. Kenna and C.B. Lang |
hep-lat/9311025 | Fast K System Generators of Pseudorandom Numbers | We suggest fast algorithm for the matrix generator of pseudorandom numbers
based on Kolmogorov-Anosov K systems which has been proposed earlier. This
algorithm reduces $N^{2}$ operation of the matrix generator to $NlnN$ and
essentially reduces the generation time. It also clarifies the algebraic
structure of this type ... | 1993-11-19 | 2022-04-06 | [
"hep-lat"
] | N.Z.Akopov, E.M.Madounts, A.B.Nersesian, G.K.Savvidy and W.Greiner |
hep-lat/9311026 | Self-Avoiding Gonihedric Srting and Spin Systems | We classify different theories of self-intersecting random surfaces assigning
special weights to intersections. When self-intersection coupling constant
$\kappa$ tends to zero, then the surface can freely inetrsect and it is
completely self-avoiding when $\kappa$ tends to infinity. Equivalent spin
systems for this gene... | 1993-11-19 | 2009-10-22 | [
"hep-lat"
] | G.K.Savvidy and K.G.Savvidy |
hep-lat/9311023 | On the Meissner effect in SU(2) lattice gauge theory | We investigate the dual superconductor model of color confinement in SU(2)
lattice gauge theory. We find that the transverse distribution of the
longitudinal chromoelectric field between static quarks displays the dual
Meissner effect. We also give evidence that the problem of color confinement
could be approached in t... | 1993-11-19 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | P. Cea and L. Cosmai |
hep-lat/9311024 | Exploring the Dynamics of Three-Dimensional Lattice Gauge Theories by
External Fields | We investigate the dynamics of three-dimensional lattice gauge theories by
means of an external Abelian magnetic field. For the SU(2) lattice gauge theory
we find evidence of the unstable modes. | 1993-11-19 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | P. Cea and L. Cosmai |
hep-lat/9311027 | Effects of spatial size, lattice doubling and source operator on the
hadron spectrum with dynamical staggered quarks | We have extended our previous study of the lattice QCD spectrum with 2
flavors of staggered dynamical quarks at $6/g^2=5.6$ and $am_q=0.025$ and 0.01
to larger lattices, with better statistics and with additional sources for the
propagators. The additional sources allowed us to estimate the $\Delta$ mass
and to measure... | 1993-11-19 | 2009-10-22 | [
"hep-lat"
] | Khalil M. Bitar, R. Edwards, Steven Gottlieb, U. M. Heller, A. D.
Kennedy, J. B. Kogut, A. Krasnitz, W. Liu, Michael C. Ogilvie, R. L. Renken,
D. K. Sinclair, R. L. Sugar, D. Toussaint, K. C. Wang |
hep-lat/9311028 | On the Phase Structure of the Schwinger Model with Wilson Fermions | We study the phase structure of the massive one flavour lattice Schwinger
model on the basis of the finite size scaling behaviour of the partition
function zeroes. At $\beta = 0$ we observe and discuss a possible discrepancy
with results obtained by a different method. | 1993-11-19 | 2009-10-22 | [
"hep-lat"
] | H. Gausterer and C.B. Lang |
hep-lat/9311020 | The pi-N Sigma term - an evaluation using staggered fermions | A lattice calculation of the pi-N sigma term is described using dynamical
staggered fermions. Preliminary results give a sea term comparable in magnitude
to the valence term. | 1993-11-18 | 2009-10-22 | [
"hep-lat"
] | R.Altmeyer, M.Goeckeler, R.Horsley, E.Laermann and G.Schierholz |
hep-lat/9311022 | Results from a study of the Nambu--Jona-Lasinio model on the lattice | The main results of our analysis of the two flavor Nambu--Jona-Lasinio model
with $SU(2) \times SU(2)$ chiral symmetry on the four--dimensional hypercubic
lattice with naive and Wilson fermions are presented. Large $N$ techniques and
numerical simulations are used to study various properties of the model. The
scalar an... | 1993-11-18 | 2009-10-22 | [
"hep-lat"
] | K.M. Bitar and P. Vranas |
hep-lat/9311019 | Super-Instantons and the Reliability of Perturbation Theory in
Non-Abelian Models | In dimension $D\leq 2$ the low temperature behavior of systems enjoying a
continuous symmetry is dominated by super-instantons: classical configurations
of arbitrarily low energy. Perturbation theory in the background of a
super-instanton produces thermodynamic answers for the invariant Green's
functions that differ fr... | 1993-11-18 | 2009-10-22 | [
"hep-lat",
"cond-mat"
] | A. Patrascioiu and E.Seiler |
hep-lat/9311021 | Multigrid Monte Carlo in the Sine Gordon model | We pose two questions about the dynamical critical behavior of multigrid
Monte Carlo: Will a multigrid Monte Carlo simulation of the two dimensional
Sine Gordon model exhibit critical slowing down, as expected by a theoretical
analysis of Metropolis acceptance rates? Can we reduce critical slowing down
caused by decrea... | 1993-11-18 | 2009-10-22 | [
"hep-lat"
] | Martin Grabenstein and Bernhard Mikeska |
hep-lat/9311018 | Fluctuation Induced First Order Phase Transitions | We study a $U(N)\times U(N)$ symmetric scalar field model in four and three
dimensions. First, using our data in four dimensions in the weak coupling
region, we demonstrate explicitly that the observed first order phase
transition is induced by quantum fluctuations. Next, based on the
renormalization group and our new ... | 1993-11-17 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Yue Shen |
hep-lat/9311016 | Fixed Point Actions for Lattice Fermions | The fixed point actions for Wilson and staggered lattice fermions are
determined by iterating renormalization group transformations. In both cases a
line of fixed points is found. Some points have very local fixed point actions.
They can be used to construct perfect lattice actions for asymptotically free
fermionic the... | 1993-11-16 | 2009-10-22 | [
"hep-lat"
] | W. Bietenholz and U.-J. Wiese |
hep-lat/9311017 | An Exact Local Hybrid Monte Carlo Algorithm for Gauge Theories | We introduce a new Monte Carlo method for pure gauge theories. It is not
intended for use with dynamical fermions. It belongs to the class of Local
Hybrid Monte Carlo (LHMC) algorithms, which make use of the locality of the
action by updating individual sites or links by following a classical mechanics
trajectory in fi... | 1993-11-16 | 2009-10-22 | [
"hep-lat"
] | A. D. Kennedy and K. M. Bitar |
hep-lat/9311014 | Recent developments in chiral gauge theories: Approach of infinitely
many fermi fields | I present the recent developments in a specific sub-field of chiral gauge
theories on the lattice. This sub-field pertains to the use of infinitely many
fermi fields to describe a single chiral field. In this approach, both
anomalous and anomaly free theories can be discussed in equal footing. It
produces the correct a... | 1993-11-15 | 2009-10-22 | [
"hep-lat"
] | Rajamani Narayanan |
hep-lat/9311013 | The ``Spin'' Structure of the Nucleon - a lattice investigation | We will discuss here an indirect lattice evaluation of the baryon axial
singlet current matrix element. This quantity may be related to the fraction of
nucleon spin carried by the quarks. The appropriate structure function has
recently been measured (EMC experiment). As in this experiment, we find that
the quarks do no... | 1993-11-15 | 2011-04-15 | [
"hep-lat"
] | R.Altmeyer, M.Goeckeler, R.Horsley, E.Laermann and G.Schierholz |
hep-lat/9311015 | Chiral determinant on the lattice -- Anomalies and Instantons | An expression for the lattice effective action induced by chiral fermions in
any even dimensions in terms of an overlap of two states is shown to have
promising properties in two and four dimensions: The correct abelian anomaly is
reproduced and gauge field configurations with non-zero topological charge are
completely... | 1993-11-15 | 2009-10-22 | [
"hep-lat"
] | R. Narayanan and H. Neuberger |
hep-lat/9311012 | The pi-N Sigma term - a lattice investigation | A lattice calculation of the pi-N sigma term is described using dynamical
staggered fermions. Preliminary results give a sea term comparable in magnitude
to the valence term. | 1993-11-13 | 2007-05-23 | [
"hep-lat"
] | R.Altmeyer, M.Goeckeler, R.Horsley, E.Laermann and G.Schierholz |
hep-lat/9311011 | Random Walks in Noninteger Dimension | One can define a random walk on a hypercubic lattice in a space of integer
dimension $D$. For such a process formulas can be derived that express the
probability of certain events, such as the chance of returning to the origin
after a given number of time steps. These formulas are physically meaningful
for integer valu... | 1993-11-10 | 2009-10-22 | [
"hep-lat"
] | Carl M. Bender, Stefan Boettcher, Lawrence R. Mead |
hep-lat/9311010 | $B \to K^* + \gamma$ and $B_s \to \phi + \gamma$ on the Lattice | A lattice calculation of the form factors that determine the ``hadronization
ratios'', such as $R_{K^*}$ and $R_{\phi}$, where $R_{K^*} \equiv [\Gamma ($B
\to K^* \gamma$)/\Gamma(b \to s \gamma)]$, is presented in the quenched
approximation. Lattice data shows strong evidence for the scaling law suggested
by heavy quar... | 1993-11-07 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | C. Bernard, P. Hsieh, and A. Soni |
hep-lat/9311009 | The Running Coupling From Lattice QCD | A recent lattice calculation of the QCD running coupling is presented. The
coupling is extracted from the force between two static quarks in the framework
of the valence quark approximation. A value of the Lambda-parameter for zero
quark flavours is determined: Lambda_msbar=0.630(38)\sqrt{\sigma}
=293(18)^{+25}_{-63} M... | 1993-11-05 | 2009-09-25 | [
"hep-lat"
] | Gunnar S. Bali |
hep-lat/9311007 | A New Approach to the Problem of Dynamical Quarks in Numerical
Simulations of Lattice QCD | Lattice QCD with an even number of degenerate quark flavours is shown to be a
limit of a local bosonic field theory. The action of the bosonic theory is real
and bounded from below so that standard simulation algorithms can be expected
to apply. The feasibility of such calculations is discussed, but no practical
tests ... | 1993-11-04 | 2009-10-22 | [
"hep-lat"
] | Martin Luescher |
hep-lat/9311005 | The SU(2) $\times$ SU(2) chiral spin model in terms of SO(3) and Z$_2$
variables: vortices and disorder | We rewrite the two-dimensional SU(2)$\times$ SU(2) chiral spin model in terms
of SO(3) and {\bf Z}$_2$ degrees of freedom. The transformation, which is
motivated by a similar representation of the corresponding lattice gauge theory
in higher dimensions, exhibits the presence of dynamical SO(3) vortices and
associated s... | 1993-11-04 | 2009-10-22 | [
"hep-lat",
"cond-mat",
"hep-th"
] | Tam\'as G. Kova\'acs and E.T. Tomboulis |
hep-lat/9311006 | Radial Excited States for Heavy Quark Systems in NRQCD | Following the Non-Relativistic QCD approach we use a gauge invariant smearing
method with factorization to measure the excitation energies for a heavy
$Q\bar{Q}$ system on a $24^3\times 48$ lattice at $\beta=6.2$. The results come
from averaging over an ensemble of 60 QCD configurations. In order to enhance
the signal ... | 1993-11-04 | 2011-04-20 | [
"hep-lat"
] | S.M. Catterall, F.R. Devlin, I.T. Drummond, R.R. Horgan |
hep-lat/9311008 | Geometric Measurement of Topological Susceptibility on Large Lattices | The topological susceptibility of the quenched QCD vacuum is measured on
large lattices for three $\beta$ values from $6.0$ to $6.4$. Charges possibly
induced by $O(a)$ dislocations are identified and shown to have little effect
on the measured susceptibility. As $\beta$ increases, fewer such questionable
charges are f... | 1993-11-04 | 2009-10-22 | [
"hep-lat"
] | Jeffrey Grandy and Rajan Gupta |
hep-lat/9311003 | Compact U(1)xU(1) Model with Minimal Interspecies Interaction | We introduce a minimally interacting pure gauge compact U(1)xU(1) model
consistent with abelian projection symmetries. This paradigm, whose
interactions are entirely due to compactness, illustrates how compactness can
contribute to interspecies interactions. Furthermore, it has a much richer
phase structure(including a... | 1993-11-03 | 2009-10-22 | [
"hep-lat"
] | Ken Yee |
hep-lat/9311004 | $B \to K^* \gamma$: Penguins on the Lattice | We calculate the leading-order matrix element for the decay $B \to K^*
\gamma$ in the quenched approximation of lattice QCD on a $24^3 \times 48$
lattice at $\beta=6.2$, using an O(a)-improved fermion action. Extrapolating
the quark masses to their physical values we obtain an on-shell form factor of
$T_1(q^2=0)=0.15+1... | 1993-11-03 | 2015-06-25 | [
"hep-lat",
"hep-ph"
] | UKQCD Collaboration |
hep-lat/9311002 | Full QCD on APE100 Machines | We present the first tests and results from a study of QCD with two flavours
of dynamical Wilson fermions using the Hybrid Monte Carlo Algorithm (HMCA) on
APE100 machines. | 1993-11-02 | 2015-06-25 | [
"hep-lat"
] | S. Antonelli, M. Bellacci, A. Donini and R. Sarno |
hep-lat/9311001 | The crossover from first to second-order finite size scaling: A
numerical study Christian Borgs | We consider a particular case of the two dimensional
Blume-Emery-Griffiths model to study the finite-size scaling for a field
driven first-order phase transition with two coexisting phases not related by a
symmetry. For low temperatures we verify the asymptotic (large volume)
predictions of the rigorous theory of Bor... | 1993-11-01 | 2009-09-25 | [
"hep-lat"
] | Stefan Kappler and Paul Rakow |
hep-lat/9310030 | C-Periodicity and the Physical Mass in the 3-State Potts Model | The standard infinite-volume definition of connected correlation function and
particle mass in the 3-state Potts model can be implemented in Monte Carlo
simulations by using C-periodic spatial boundary conditions. This avoids both
the breaking of translation invariance (cold wall b.c.) and the phase-dependent
and thus ... | 1993-10-29 | 2009-10-22 | [
"hep-lat"
] | R.V.Gavai (ICTP, Trieste, Italy, and Tata Institute of Fundamental
Research, Bombay 400 005, India) and L.Polley (FB Physik, Oldenburg
University, 26111 Oldenburg, Germany) |
hep-lat/9310029 | Towards Multigrid Methods for Propagators of Staggered Fermions with
Improved Averaging and Interpolation Operators | A Dirac choice for the averaging kernel $C$ is implemented numerically. This
improved kernel will be needed in gauge covariant multigrid computations for
propagators of staggered fermions. Results for $C$ and the variational coarse
grid operator will be given in 2-$d$ $SU(2)$ gauge fields. C++ is advocated for
future a... | 1993-10-28 | 2016-08-31 | [
"hep-lat"
] | Thomas Kalkreuter |
hep-lat/9310027 | A Study of the Nambu--Jona-Lasinio Model on the Lattice | We present our full analysis of the two flavor Nambu--Jona-Lasinio model with
$SU(2) \times SU(2)$ chiral symmetry on the four--dimensional hypercubic
lattice with naive and Wilson fermions. We find that this model is an excellent
toy field theory to investigate issues related to lattice QCD. We use the large
$N$ appro... | 1993-10-26 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | K.M. Bitar and P.M. Vranas |
hep-lat/9310028 | Capillary Wave Approach to Order-Order Fluid Interfaces in the 3D
Three-State Potts Model | The physics of fluid interfaces between domains of different magnetization in
the ordered phase of the 3D three-state Potts model is studied by means of a
Monte Carlo simulation. It is shown that finite--size effects in the interface
free energy are well described by the capillary wave model at two loop order,
supporti... | 1993-10-26 | 2009-10-22 | [
"hep-lat",
"cond-mat",
"hep-th"
] | Paolo Provero and Stefano Vinti |
hep-lat/9310025 | Ising Model Universality for Two-Dimensional Lattices | We use the single-cluster Monte Carlo update algorithm to simulate the Ising
model on two-dimensional Poissonian random lattices of Delaunay type with up to
80\,000 sites. By applying reweighting techniques and finite-size scaling
analyses to time-series data near criticality, we obtain unambiguous support
that the cri... | 1993-10-25 | 2009-10-22 | [
"hep-lat"
] | W. Janke, M. Katoot, and R. Villanova |
hep-lat/9310024 | Interface Tensions and Perfect Wetting in the Two-Dimensional
Seven-State Potts Model | We present a numerical determination of the order-disorder interface tension,
\sod, for the two-dimensional seven-state Potts model. We find
$\sod=0.0114\pm0.0012$, in good agreement with expectations based on the
conjecture of perfect wetting. We take into account systematic effects on the
technique of our choice: the... | 1993-10-25 | 2009-10-22 | [
"hep-lat"
] | B.Grossmann and Sourendu Gupta |
hep-lat/9310026 | Fitting Correlated Data | We discuss fitting correlated data - with the example of hadron mass
spectroscopy in mind. The main conclusion is that the method of minimising
correlated $\chi^2$ is unreliable if the data sample is too small. | 1993-10-25 | 2008-11-26 | [
"hep-lat"
] | C. Michael |
hep-lat/9310023 | The nature of the thermal phase transition with Wilson quarks | We describe a series of simulations of high temperature QCD with two flavors
of Wilson quarks aimed at clarifying the nature of the high temperature phase
found in current simulations. Most of our work is with four time slices,
although we include some runs with six and eight time slices for comparison. In
addition to ... | 1993-10-21 | 2009-09-25 | [
"hep-lat"
] | Claude Bernard, Thomas A. DeGrand, Carleton DeTar, Steven Gottlieb, A.
Hasenfratz, Leo Karkkainen, R. L. Sugar and D. Toussaint |
hep-lat/9310022 | A New Way to Set the Energy Scale in Lattice Gauge Theories and its
Application to the Static Force and $\alpha_s$ in SU(2) Yang--Mills Theory | We introduce a hadronic scale $R_0$ through the force $F(r)$ between static
quarks at intermediate distances $r$. The definition $F(R_0)R_0^2=1.65$ amounts
to $R_0 \simeq 0.5$~fm in phenomenological potential models. Since $R_0$ is
well defined and can be calculated accurately in a Monte Carlo simulation, it
is an idea... | 1993-10-21 | 2010-02-18 | [
"hep-lat"
] | R. Sommer |
hep-lat/9310020 | Critical Behaviour of the 3d Gross-Neveu and Higgs-Yukawa Models | We measure the critical exponents of the three dimensional Gross-Neveu model
with two four-component fermions. The exponents are inferred from the scaling
behaviour of observables on different lattice sizes. We also calculate the
exponents, through a second order epsilon-expansion around 4d, for the three
dimensional H... | 1993-10-19 | 2009-09-25 | [
"hep-lat"
] | L. Karkkainen, R. Lacaze, P. Lacock, and B.Petersson |
hep-lat/9310019 | The running coupling from lattice gauge theory: | I discuss some calculations of the running coupling in SU($N$) gauge theories
from lattice simulations, centering on the work of the UKQCD collaboration.
This talk is introductory in nature; full details have been published
elsewhere. | 1993-10-19 | 2007-05-23 | [
"hep-lat"
] | P.W. Stephenson |
hep-lat/9310018 | Quark Mass Renormalization on the Lattice with Staggered Fermions | The QCD light quark mass renormalized at a 1 GeV scale in the $ \overline{MS}
$ scheme is obtained from the numerical results of the lattice QCD simulation
with staggered fermions. The primary emphasis is given to the connection
between the lattice and continuum parameters. The results are compared with
those from the ... | 1993-10-18 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Weonjong Lee |
hep-lat/9310021 | An Algorithm for Dynamic Load Balancing of Synchronous Monte Carlo
Simulations on Multiprocessor Systems | We describe an algorithm for dynamic load balancing of geometrically
parallelized synchronous Monte Carlo simulations of physical models. This
algorithm is designed for a (heterogeneous) multiprocessor system of the MIMD
type with distributed memory. The algorithm is based on a dynamic partitioning
of the domain of the... | 1993-10-18 | 2009-10-22 | [
"hep-lat"
] | P. Altevogt, A. Linke |
hep-lat/9310016 | Monte Carlo Simulation of 2-D Quantum Gravity as Open Dynamically
Triangulate Random Surfaces | We describe a Monte Carlo procedure for the simulation of dynamically
triangulate random surfaces with a boundary (topology of a disk). The algorithm
keeps the total number of triangles fixed, while the length of the boundary is
allowed to fluctuate. The algorithm works in the presence of matter fields. We
here present... | 1993-10-15 | 2009-10-22 | [
"hep-lat"
] | E. Adi, M. Hasenbusch, M. Marcu, E. Pazy, K. Pinn, and S. Solomon |
hep-lat/9310017 | Discretized Laplacians on an Interval and their Renormalization Group | The Laplace operator admits infinite self-adjoint extensions when considered
on a segment of the real line. They have different domains of essential
self-adjointness characterized by a suitable set of boundary conditions on the
wave functions. In this paper we show how to recover these extensions by
studying the contin... | 1993-10-15 | 2015-06-25 | [
"hep-lat",
"hep-th"
] | G. Bimonte, E .Ercolessi and P. Teotonio-Sobrinho |
hep-lat/9310015 | A Cluster Method for the Ashkin--Teller Model | A cluster Monte Carlo algorithm for the Ashkin-Teller (AT) model is
constructed according to the guidelines of a general scheme for such
algorithms. Its dynamical behaviour is tested for the square lattice AT model.
We perform simulations on the line of critical points along which the exponents
vary continuously, and f... | 1993-10-14 | 2009-09-25 | [
"hep-lat",
"cond-mat"
] | S. Wiseman, E. Domany |
hep-lat/9310014 | The Physical Phase of Dimensionally Reduced Gauge Theories | We investigate the relationship between the high temperature deconfined phase
of the SU(2) gauge theory to the phases of the corresponding three dimensional
adjoint Higgs model. For various temperatures we simulate the effective theory
in a neighbourhood of the physical states, that is of those values of the
coupling c... | 1993-10-12 | 2009-09-25 | [
"hep-lat"
] | L. Karkkainen, P. Lacock, D.E. Miller, B. Petersson and T. Reisz |
hep-lat/9310013 | Comparison of Monte Carlo Results for the 3D Ising Interface Tension and
Interface Energy with (Extrapolated) Series Expansions | We compare Monte Carlo results for the interface tension and interface energy
of the 3-dimensional Ising model with Pad\'e and inhomogeneous differential
approximants of the low temperature series that was recently extended by Arisue
to $17^{\rm th}$ order in $u=\exp(-4\beta)$. The series is expected to suffer
from the... | 1993-10-11 | 2009-10-22 | [
"hep-lat",
"cond-mat"
] | M. Hasenbusch and K. Pinn |
hep-lat/9310010 | Monopole Condensation and Confinement in SU(2) QCD (1) | An effective monopole action is derived from vacuum configurations after
abelian projection in the maximally abelian gauge in $SU(2)$ QCD. Entropy
dominance over energy of monopole loops is seen on the renormalized lattice
with the spacing $b>b_c\simeq 5.2\times10^{-3} \Lambda_L^{-1}$ when the
physical volume of the sy... | 1993-10-09 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Hiroshi Shiba and Tsuneo Suzuki |
hep-lat/9310012 | Momentum Lattice Simulation on a Small Lattice Using Stochastic
Quantization | We have studied the scalar $\phi^4$-model in the symmetric phase and the
non--compact $U(1)$ gauge theory on a momentum lattice using the Langevin
equation for generating configurations. In the $\phi^4$-model we have analyzed
the renormalized mass and in the $U(1)$-model we have analyzed the Wilson loop
operator. We us... | 1993-10-09 | 2015-06-25 | [
"hep-lat"
] | H. Kr\"oger, S. Lantagne and K.J.M. Moriarty |
hep-lat/9310011 | Monopole Condensation and Confinement in SU(2) QCD (2) | Monopole and photon contributions to Wilson loops are calculated using
Monte-Carlo simulations of SU(2) QCD in the maximally abelian gauge. The string
tensions of SU(2) QCD are well reproduced by extended monopole contributions
alone. | 1993-10-09 | 2008-02-03 | [
"hep-lat",
"hep-ph"
] | Hiroshi Shiba and Tsuneo Suzuki |
hep-lat/9310009 | Meson Decay Constants from the Valence Approximation to Lattice QCD | We evaluate $f_{\pi}/ m_{\rho}$, $f_K/ m_{\rho}$, $1/f_{\rho}$, and $
m_{\phi}/(f_{\phi} m_{\rho})$, extrapolated to physical quark mass, zero
lattice spacing and infinite volume, for lattice QCD with Wilson quarks in the
valence (quenched) approximation. The predicted ratios differ from experiment
by amounts ranging f... | 1993-10-07 | 2009-10-22 | [
"hep-lat"
] | F. Butler, H. Chen, J. Sexton, A. Vaccarino, and D. Weingarten |
hep-lat/9310008 | The Nambu--Jona-Lasinio Model of QCD on the Lattice | In an effort to investigate some of the low energy properties of QCD, in
particular those related to chiral symmetry breaking, as well as to obtain
insights on the behavior of an interacting theory of fermions on the lattice,
the two flavor Nambu--Jona-Lasinio model with $SU(2) \times SU(2)$ chiral
symmetry is studied ... | 1993-10-07 | 2011-07-19 | [
"hep-lat",
"hep-ph"
] | K.M. Bitar and P.M. Vranas |
hep-lat/9310007 | Semileptonic form factors of heavy-light mesons from lattice QCD | The form factors for the semileptonic decays of heavy-light pseudoscalar
mesons of the type $D \to Ke\nu$ are studied in quenched lattice QCD at
$\beta=6.0$ using Wilson fermions. We explore new numerical techniques for
improving the signal and study $O(a)$ corrections using three different lattice
transcriptions of th... | 1993-10-07 | 2007-05-23 | [
"hep-lat"
] | Rajan Gupta, Tanmoy Bhattacharya and David Daniel |
hep-lat/9310006 | Anomalies and chiral defect fermions | Chiral defect fermions in the background of an external, $2n$ dimensional
gauge field are considered. Assuming first a finite extra dimension, we
calculate the axial anomaly in a vector-like, gauge invariant model for
arbitrary $n$, and the consistent anomaly in a gauge {\it variant} model with a
chiral spectrum. For t... | 1993-10-06 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | Yigal Shamir |
hep-lat/9310005 | Zooming-in on the SU(2) fundamental domain | For SU(2) gauge theories on the three-sphere we analyse the Gribov horizon
and the boundary of the fundamental domain in the 18 dimensional subspace that
contains the tunnelling path and the sphaleron and on which the energy
functional is degenerate to second order in the fields. We prove that parts of
this boundary co... | 1993-10-05 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | Pierre van Baal and Bas van den Heuvel |
hep-lat/9310004 | Perturbative Corrections for Staggered Four-Fermion Operators | We present results for one-loop matching coefficients between continuum
four-fermion operators, defined in the Naive Dimensional Regularization scheme,
and staggered fermion operators of various types. We calculate diagrams
involving gluon exchange between quark lines, and ``penguin'' diagrams
containing quark loops. F... | 1993-10-05 | 2011-07-19 | [
"hep-lat"
] | Stephen Sharpe and Apoorva Patel |
hep-lat/9310003 | 2D O(3) + 2D QG | It has been suggested that the peak in the specific heat observed numerically
for random surface actions with extrinsic curvature on dynamical lattices might
be the result of a low mass bound state in an asymptotically free theory,
rather than the signal for a real phase transition. The $O(3)$ model on a fixed
lattice ... | 1993-10-04 | 2008-11-26 | [
"hep-lat"
] | C.F. Baillie and D.A. Johnston |
hep-lat/9310002 | Almost Gauge Invariant Lattice Actions for Chiral Gauge Theories, using
Laplacian Gauge Fixing | It is described how to obtain an almost gauge invariant lattice action $S$
for chiral gauge theories, or other models in which a straightforward
discretization leads to a lattice action $S^\pr$ in which gauge invariance is
broken. The lattice action is `almost' gauge invariant, because a local gauge
transformation leav... | 1993-10-01 | 2009-10-22 | [
"hep-lat"
] | Jeroen C. Vink |
hep-lat/9310001 | Instantons and Surface Tension at a First-Order Transition | We study the dynamics of the first order phase transition in the two
dimensional 15-state Potts model, both at and off equilibrium. We find that
phase changes take place through nucleation in both cases, and finite volume
effects are described well through an instanton computation. Thus a dynamical
measurement of the s... | 1993-10-01 | 2009-10-22 | [
"hep-lat",
"cond-mat",
"hep-ph"
] | Sourendu Gupta |
hep-lat/9309021 | A Consumer's Guide to Lattice QCD Results | I present an overview of recent lattice QCD results on hadron spectroscopy
and matrix elements. Case studies include light quark spectroscopy, the
determination of $\alpha_s$ from heavy quark spectroscopy, the D-meson decay
constant, a calculation of the Isgur-Wise function, and some examples of the
(lack of) effect of... | 1993-09-30 | 2007-05-23 | [
"hep-lat"
] | T. DeGrand |
hep-lat/9309022 | Scaling of Pseudo-Critical Couplings in Two-Flavour QCD | We study the scaling behaviour of the pseudo-critical couplings for the
chiral phase transition in two-flavour QCD. We show that all existing results
from lattice simulations on lattices with temporal extent $N_\tau = 4$, 6 and 8
can be mapped onto a universal scaling curve. The relevant combination of
critical exponen... | 1993-09-30 | 2009-10-22 | [
"hep-lat"
] | Frithjof Karsch |
hep-lat/9309019 | Renormalization Group Study of the soliton mass on the (lambda
Phi^4)_{1+1} lattice model | We compute, on the $(\lambda \Phi^4)_{1+1}$ model on the lattice, the soliton
mass by means of two very different numerical methods. First, we make use of a
``creation operator'' formalism, measuring the decay of a certain correlation
function. On the other hand we measure the shift of the vacuum energy between
the sym... | 1993-09-28 | 2009-10-22 | [
"hep-lat"
] | J. C. Ciria, A. Tarancon |
hep-lat/9309020 | A Portable High-Quality Random Number Generator for Lattice Field Theory
Simulations | The theory underlying a proposed random number generator for numerical
simulations in elementary particle physics and statistical mechanics is
discussed. The generator is based on an algorithm introduced by Marsaglia and
Zaman, with an important added feature leading to demonstrably good statistical
properties. It can ... | 1993-09-28 | 2009-10-22 | [
"hep-lat"
] | Martin Luescher |
hep-lat/9309018 | Anomalous fermion number violation and numerical simulations | After discussing the problem of lattice regularization of chiral gauge
theories, a simple model for anomalous fermion number violation is formulated
which can be numerically studied with present day technique. Exploratory
results of numerical simulations of a two-dimensional U(1) Higgs model are
presented. | 1993-09-27 | 2007-05-23 | [
"hep-lat"
] | Istvan Montvay |
hep-lat/9309017 | Baryon Density Correlations in High Temperature Hadronic Matter | As part of an ongoing effort to characterize the high temperature phase of
QCD, in a numerical simulation using the staggered fermion scheme, we measure
the quark baryon density in the vicinity of a fixed test quark at high
temperature and compare it with similar measurements at low temperature and at
the crossover tem... | 1993-09-26 | 2008-11-26 | [
"hep-lat"
] | Claude Bernard, Thomas A. DeGrand, Carleton DeTar, Steven Gottlieb,
Alex Krasnitz, Robert L. Sugar, and Douglas Toussaint |
hep-lat/9309016 | Lattice Gauge Theory -- Present Status | Lattice gauge theory is our primary tool for the study of non-perturbative
phenomena in hadronic physics. In addition to giving quantitative information
on confinement, the approach is yielding first principles calculations of
hadronic spectra and matrix elements. After years of confusion, there has been
significant re... | 1993-09-24 | 2008-11-26 | [
"hep-lat"
] | Michael Creutz |
hep-lat/9309015 | Investigation of the Domain Wall Fermion Approach to Chiral Gauge
Theories on the Lattice | We investigate a recent proposal to construct chiral gauge theories on the
lattice using domain wall fermions. We restrict ourselves to the finite volume
case, in which two domain walls are present, with modes of opposite chirality
on each of them. We couple the chiral fermions on only one of the domain walls
to a gaug... | 1993-09-23 | 2009-10-22 | [
"hep-lat"
] | Maarten F.L. Golterman, Karl Jansen, Donald N. Petcher and Jeroen C.
Vink |
hep-lat/9309014 | Perturbative analysis for Kaplan's lattice chiral fermions | Perturbation theory for lattice fermions with domain wall mass terms is
developed and is applied to investigate the chiral Schwinger model formulated
on the lattice by Kaplan's method. We calculate the effective action for gauge
fields to one loop, and find that it contains a longitudinal component even for
anomaly-fre... | 1993-09-22 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | S. Aoki and H. Hirose |
hep-lat/9309013 | Weyl Neutrinos on a Lattice: An Explicit Construction | Introducing a new and universally applicable discretizing technique, I
construct a class of local and unitary lattice theories of Weyl neutrinos; this
solves a longstanding and allegedly unsolvable problem in quantum field theory.
En route, I also prove a general ``go'' theorem that all Lagrangian-density
based continu... | 1993-09-18 | 2016-08-31 | [
"hep-lat",
"cond-mat",
"hep-th"
] | Anil K. Trivedi |
hep-lat/9309012 | The Nielsen-Ninomiya ``No-Go'' Theorem is False | The Nielsen-Ninomiya no-go theorem asserts that chiral Weyl~(``neutrino'')
fields cannot exist on lattices. However, the actual mathematical arguments
advanced in the theorem fail to make that case. The theorem leaves the problem
of lattice neutrinos completely open; it identifies no obstacle which would
prevent us fro... | 1993-09-18 | 2008-02-03 | [
"hep-lat",
"cond-mat",
"hep-th"
] | Anil K. Trivedi |
hep-lat/9309011 | Hadron Spectrum and Matrix Elements in QCD with Dynamical Wilson
Fermions at 6/g^2=5.3 | We present results of a lattice simulation of quantum chromodynamics with two
degenerate flavors of dynamic Wilson fermions at $6/g^2=5.3$ at each of two
dynamical fermion hopping parameters, $\kappa=0.1670$ and 0.1675, corresponding
to pion masses in lattice units of about 0.45 and 0.31. The simulations include
three ... | 1993-09-17 | 2009-10-22 | [
"hep-lat"
] | K. M. Bitar, et. al. (High Energy Monte Carlo Grand Challenge) |
hep-lat/9309010 | Phase diagrams of a Higgs-Yukawa system with chirally invariant lattice
fermion actions | We study the phase structure of a $Z_2$ lattice Higgs-Yukawa system with
different forms of chirally invariant lattice fermion actions: naive, two types
of non-local actions, and a mirror fermion action. The calculations are
performed in the variational mean field approximation with contribution of
fermionic determinan... | 1993-09-17 | 2009-09-25 | [
"hep-lat"
] | Sergei V. Zenkin |
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