PRECISION UPSILON-SPECTROSCOPY FROM NONRELATIVISTIC LATTICE QCD

被引：135
作者：
DAVIES, CTH
HORNBOSTEL, K
LANGNAU, A
LEPAGE, GP
LIDSEY, A
SHIGEMITSU, J
SLOAN, J
机构：
[1] SO METHODIST UNIV, DALLAS, TX 75275 USA
[2] CORNELL UNIV, NEWMAN LAB NUCL STUDIES, ITHACA, NY 14853 USA
[3] FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA
[4] OHIO STATE UNIV, COLUMBUS, OH 43210 USA
来源：
PHYSICAL REVIEW D | 1994年 / 50卷 / 11期
关键词：
D O I：
10.1103/PhysRevD.50.6963
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The spectrum of the Υ system is investigated using the nonrelativistic lattice QCD approach to heavy quarks and ignoring light quark vacuum polarization. We find good agreement with experiment for the Υ,Υ',Υ'' and for the center of mass and fine structure of the χb states. The lattice calculations predict bb̄ D states with a center of mass at (10.20±0.07±0.03) GeV. Fitting procedures aimed at extracting both ground and excited state energies are developed. We calculate a nonperturbative dispersion mass for the Υ(1S) and compare it with tadpole-improved lattice perturbation theory. © 1994 The American Physical Society.
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页码：6963 / 6977
页数：15
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