Light Hadron Masses from Lattice Quantum Chromodynamics on Asymmetric Lattices with Improved Actions

Chin. Phys. Lett.

2002, Vol. 19

Issue (5): 640-643 DOI:

Original Articles

Light Hadron Masses from Lattice Quantum Chromodynamics on Asymmetric Lattices with Improved Actions

LIU Chuan¹;MA Jian-Ping²

¹Department of Physics, Peking University, Beijing 100871 ²Institute of Theoretical Physics, Chinese Academy Sciences, Beijing 100080

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LIU Chuan, MA Jian-Ping 2002 Chin. Phys. Lett. 19 640-643

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Abstract We simulate lattice quantum chromodynamics on asymmetric lattices with improved actions, where quenching approximation is used. These lattices have a spatial lattice spacing a_s at 0.3 and 0.4fm, and a temporal lattice spacing a_t from 0.14 to 0.08fm. The lattice spacing error due to a_s is greatly reduced through improving both quark- and gluon-actions at certain level. We find that masses of mesons have weak dependence on both lattice spacings, while the a_s and a_t dependence for baryons is more significant. With suitable modelling of these dependencies, we are able to obtain the nucleon mass in agreement with the experiment.

Keywords: 11.15.Ha 12.38.Gc

Published: 01 May 2002

PACS:	11.15.Ha	(Lattice gauge theory)
	12.38.Gc	(Lattice QCD calculations)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2002/V19/I5/0640

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