QUENCHED SPECTRUM WITH STAGGERED FERMIONS

被引：75

作者：

GUPTA, R

GURALNIK, G

KILCUP, GW

SHARPE, SR

机构：

[1] BROWN UNIV,DEPT PHYS,PROVIDENCE,RI 02912

[2] OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210

[3] UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106

[4] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

来源：

PHYSICAL REVIEW D | 1991年 / 43卷 / 06期

关键词：

D O I：

10.1103/PhysRevD.43.2003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results for the spectrum of QCD in the quenched approximation using staggered fermions at beta = 5.7, 6.0, and 6.2. We use extended wall sources, which give a better projection onto the ground state, and allow us to study many nonlocal pion and rho states, as well as the DELTA baryon. Staggered flavor-symmetry breaking reduces dramatically from beta = 5.7 to 6.2. For beta = 6, the ratio m(N)/m-rho lies significantly below 1.5 for m(q) < m(s). At beta = 6 we study finite-volume effects using 16(3) x 40 and 24(3) x 40 lattices. We reanalyze our old data at beta = 6.2 and resolve the problem of the anomalously light scalar state.

引用

页码：2003 / 2026

页数：24

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