Wed·Oct 9, 2002Wednesday·October 9, 2002

1. 01*

   Lattice QCD with dynamical domain wall quarks

   Taku Izubuchi · RBC Collaboration

   We study lattice QCD with two flavors of dynamical domain wall quarks. With renormalization group motivated actions, we find chiral symmetry can be preserved to a high degree at lattice cut off of a^{-1} \sim 2 GeV even for fifth dimension size as small as L_s = 12. In addition two new steps are introduced to improve the performance of the hybrid Monte Carlo simulation.

   hep-latNucl.Phys.B Proc.Suppl.(2003)·13 citations
2. 02*

   Lattice study of "f${}_0$(600) or $\sigma$"

   Teiji Kunihiro🇯🇵 · Shin Muroya🇯🇵 · Atsushi Nakamura🇯🇵 · Chiho Nonaka🇯🇵 · Motoo Sekiguchi🇯🇵 · Hiroaki Wada (SCALAR Collaboration)🇯🇵

   We investigate the propagator of "f${}_0$(600) or the $\sigma$" by the full-QCD simulation with Wilson fermions. We calculate the mesonic correlator in the I=0, $J^P=0^{+}$ channel on the $8^3\times 16$ lattice. Plaquet action and Wilson fermion action are adopted. A coupling constant $\beta$ is set to 4.8 and three kinds of hopping parameter, $\kappa$=0.1846, 0.1874 and 0.1891 are assayed. The disconnected diagram in the propagator is evaluated through taking average over 500 or 1000 Z2 noise. Simulations with the larger hopping parameter provide us with less noisy results. Though the statistics is not yet enough, our results indicate the existence of a pole with a mass in almost the same order as that of the $\rho$.

   hep-latNucl.Phys.B Proc.Suppl.(2003)·14 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.