Strange and charmed hadron spectroscopy on a 32(3)x48 lattice at beta=6.3

被引:2
作者
deForcrand, P
Fujisaki, M
Okuda, M
Hashimoto, T
Hioki, S
Miyamura, O
Nakamura, A
Stamatescu, IO
Tago, Y
Takaishi, T
机构
[1] FUJITSU LTD, HIGH PERFORMANCE COMP GRP, MIHAMA KU, CHIBA 261, JAPAN
[2] FUKUI UNIV, DEPT APPL PHYS, FUKUI 910, JAPAN
[3] HIROSHIMA UNIV, DEPT PHYS, HIGASHIHIROSHIMA 724, JAPAN
[4] YAMAGATA UNIV, FAC EDUC, YAMAGATA 990, JAPAN
[5] UNIV HEIDELBERG, INST THEORET PHYS, D-69120 HEIDELBERG, GERMANY
[6] FEST HEIDELBERG, D-69120 HEIDELBERG, GERMANY
[7] FUJITSU LTD, COMPUTAT SCI RES LAB, MIHAMA KU, CHIBA 261, JAPAN
关键词
lattice QCD; hadron spectroscopy;
D O I
10.1016/0550-3213(95)00597-8
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The results of meson and baryon spectroscopy composed of charm and strange quarks are reported by the use of quenched Wilson fermions on a 32(3) x 48 lattice at beta = 6.3, Ground state hadrons composed of two or three quarks with different hopping parameters, in a region kappa = 0.13 to 0.15, are measured, It is found that their masses are well described by a quadratic polynomial in terms of multi-1/kappa variables in this region. Adjusting vector meson mass ratios between (s (s) over bar), (s (c) over bar) and (c (c) over bar), the hopping parameters of strange quark and charm quark are determined to be kappa(s) = 0.14999(22) and kappa(c) = 0.13548(82) without chiral extrapolation, Masses of not yet observed ssc, scc and ccc baryons in GeV are estimated to be 2.778 +/- 0.016 (ssc), 3.858 +/- 0.015 (scc) for (1/2)(+) and 2.813 +/- 0.167 (ssc), 3.869 +/- 0.055 (scc), 4.880 +/- 0.017 (ccc) for (3/2)(+). As for the meson spin splitting structure, the quenched Wilson spectrum is more degenerate in comparison with real hadrons, as already pointed out by many authors.
引用
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页码:413 / 426
页数:14
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