Tue·Sep 18, 2001Tuesday·September 18, 2001

1. 01*

   I=2 Pion Scattering Length from a Coarse Anisotropic Lattice Calculation

   Chuan Liu🇨🇳 · Junhua Zhang🇨🇳 · Ying Chen🇨🇳 · J.P. Ma🇨🇳

   Using the tadpole improved clover Wilson quark action on coarse anisotropic lattices, the $\pi \pi$ scattering length in the I=2 channel is calculated within quenched approximation. We show that such a calculation is feasible using small lattices on small computers provided that the finite volume and finite lattice spacing errors are under control. Our results are extrapolated towards the chiral, infinite volume and continuum limit. Comparisons of our results with previous lattice results from JLQCD collaboration, the new results from E865 experiment, and the results from Chiral Perturbation Theory are made. Good agreements are found.

   hep-lathep-ph15 citations
2. 02*

   Scalar Glueball Mass Reduction at Finite Temperature in SU(3) Anisotropic Lattice QCD

   Noriyoshi Ishii (Wako, RIKEN)🇯🇵 · Hideo Suganuma (Tokyo Inst. Tech.)🇯🇵 · Hideo Matsufuru (Kyoto U., Yukawa Inst., Kyoto)🇯🇵

   We report the first study of the glueball properties at finite temperatures below T_c using SU(3) anisotropic lattice QCD with beta=6.25, the renormalized anisotropy xi \equiv a_s/a_t = 4 and 20^3 \times N_t (N_t=35,36,37,38,40,43,45,50,72) at the quenched level. From the temporal correlation analysis with the smearing method, about 20 % mass reduction is observed for the lowest scalar glueball as m_G(T)=1250 \pm 50MeV for 0.8 T_c < T < T_c in comparison with m_G \simeq 1500 \sim 1700MeV at T \simeq 0.

   hep-latPRD(2002)·80 citations
3. 03*

   Atomic Bose Condensation and the Lattice

   Guy D. Moore🇺🇸

   I show how interaction corrections to the Bose condensation temperature of an atomic gas can be computed using a combination of perturbative effective field theory and lattice techniques.

   hep-latNucl.Phys.B Proc.Suppl.(2002)·0 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.