HEP Lattice·hep-lat

Wed·Sep 22, 2004Wednesday·September 22, 2004

8 papers—7 primary·1 cross-listed·reconstructed*

01*
The Omega- and the strange quark mass
Doug Toussaint (University of Arizona)🇺🇸 · C.T.H. Davies (University of Glasgow)🇬🇧
Omega- correlators have been calculated on the MILC collaboration's archive of three flavor improved staggered quark lattices. The Omega- is stable under strong interactions (140 MeV below threshold). It provides a valuable consistency check on a combination of strange quark mass and lattice scale determination from other quantities. Alternatively, the Omega- mass could be used to fix the strange quark mass, which gives a check on computations of the strange quark mass based on the kaon mass.
hep-latNucl.Phys.B Proc.Suppl.(2005)·14 citations
02*
Hadronic physics with domain-wall valence and improved staggered sea quarks
D. B. Renner🇺🇸 · W. Schroers🇺🇸 · R. Edwards🇺🇸 · G. T. Fleming🇺🇸 · Ph. Hagler🇳🇱 · J. W. Negele🇺🇸 · K. Orginos🇺🇸 · A. V. Pochinski🇺🇸 · D. Richards (for the LHP Collaboration)🇺🇸
With the advent of chiral fermion formulations, the simulation of light valence quarks has finally become realistic for numerical simulations of lattice QCD. The simulation of light dynamical quarks, however, remains one of the major challenges and is still an obstacle to realistic simulations. We attempt to meet this challenge using a hybrid combination of Asqtad sea quarks and domain-wall valence quarks. Initial results for the proton form factor and the nucleon axial coupling are presented.
hep-latNucl.Phys.B Proc.Suppl.(2005)·98 citations
03*
Electroweak penguins and SUSY K^0-\bar K^0 mixing with Neuberger quarks
Federico Berruto (1)🇺🇸 · Nicolas Garron (2)🇫🇷 · Christian Hoelbling (2)🇫🇷 · Joseph Howard (3)🇺🇸 · Laurent Lellouch (2)🇫🇷 · Silvia Necco (2)🇫🇷 · Claudio Rebbi (3)🇺🇸 · Noam Shoresh (3) ((1) BNL, (2) CPT Marseille, (3) Boston University)🇺🇸
We present results for Delta I=3/2 and Delta S=2 matrix elements relevant for CP violation in K->Pi Pi decays and for the K_S-K_L mass difference in the standard model and beyond. They were obtained with Neuberger fermions on quenched gauge configurations generated with the Wilson plaquette action at beta=6.0 on an 18^3x64 lattice.
hep-lathep-phNucl.Phys.B Proc.Suppl.(2005)·3 citations
04*
Light hadron spectra and wave functions in quenched QCD with overlap quarks on a large lattice
Federico Berruto (1)🇺🇸 · Nicolas Garron (2)🇫🇷 · Christian Hoelbling (2)🇫🇷 · Joseph Howard (3)🇺🇸 · Laurent Lellouch (2)🇫🇷 · Silvia Necco (2)🇫🇷 · Claudio Rebbi (3)🇺🇸 · Noam Shoresh (3) ((1) BNL, (2) CPT Marseille, (3) Boston University)🇺🇸
A simulation of quenched QCD with the overlap Dirac operator has been completed using 100 Wilson gauge configurations at beta=6 on an 18^3x64 lattice. We present results for meson and baryon masses, meson final state "wave functions'' and other observables.
hep-latNucl.Phys.B Proc.Suppl.(2005)·3 citations
05*
Exact 2+1 flavour RHMC simulations
M. A. Clark🇬🇧 · A. D. Kennedy🇬🇧 · Z. Sroczynski🇬🇧
We consider the Rational Hybrid Monte Carlo algorithm for performing exact 2+1 flavour fermion simulations. The specific cases of ASQTAD and domain wall fermions are considered. We find that in both cases the naive performance is similar to conventional hybrid algorithms.
hep-latNucl.Phys.B Proc.Suppl.(2005)·148 citations
06*
Accelerating Fermionic Molecular Dynamics
M. A. Clark🇬🇧 · A. D. Kennedy🇬🇧
We consider how to accelerate fermionic molecular dynamics algorithms by introducing n pseudofermion fields coupled with the nth root of the fermionic kernel. This reduces the maximum pseudofermionic force, and thus allows a larger molecular dynamics integration step size without hitting an instability in the integrator.
hep-latNucl.Phys.B Proc.Suppl.(2005)·15 citations
07*
Finite temperature phase transition in the 4d compact U(1) lattice gauge theory
Michele Vettorazzo🇨🇭 · Philippe de Forcrand🇨🇭
We study the phase diagram of the 4d compact U(1) gauge theory as a function of the number of Euclidean time slices. We use the helicity modulus as order parameter to probe the phase transitions. The order of the transition along the phase boundaries is studied and the possibility of a continuum limit is discussed. We present new, strong evidence that the T=0 bulk phase transition is first-order.
hep-latPLB(2004)·24 citations
08*
Two-Dimensional Heisenberg Model with Nonlinear Interactions: 1/N Corrections
Sergio Caracciolo🇮🇹 · Bortolo Matteo Mognetti🇮🇹 · Andrea Pelissetto🇮🇹
We investigate a two-dimensional classical $- v ec t or m o d e l w i t ha g e n er i c n e a r es t - n e i g hb or in t er a c t i o n$ W(\bsigma_i\cdot \bsigma_j) $in t h e l a r g e - N l imi t, f oc u s in g o n t h e f ini t e - t e m p er a t u r e t r an s i t i o n p o in t a tw hi c h e n er g y - e n er g y cor r e l a t i o n s b eco m ecr i t i c a l . W es h o w t ha tt hi s t r an s i t i o nb e l o n g s t o t h e I s in g u ni v er s a l i t y c l a ss . H o w e v er, t h e w i d t h o f t h er e g i o nin w hi c h I s in g b e ha v i or i so b ser v e d sc a l es a s$ 1/N^{3/2} $a l o n g t h e ma g n e t i c d i r ec t i o nan d a s 1/ N in t h e t h er ma l d i r ec t i o n; o u t s i d e a cr osso v er t o m e an - f i e l d b e ha v i or occ u r s . T hi se x pl ain s w h y o n l y m e an - f i e l d b e ha v i or i so b ser v e df or$ N=\infty$
↳ cond-mat.stat-mechhep-latNPB(2005)·12 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.