The strange quark mass from finite energy sum rules

被引：25

作者：

Maltman, K

机构：

[1] York Univ, Dept Math & Stat, N York, ON M3J 1P3, Canada

[2] Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia

来源：

PHYSICS LETTERS B | 1999年 / 462卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/S0370-2693(99)00868-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The strange quark mass is determined from a study of the correlator [0\T(J(s)J(s)(dagger))\0] (where J(s) = partial derivative(mu)(s) over bar gamma(mu)u, the divergence of the strange vector current) using a family of finite energy sum rules recently shown to be very accurately satisfied in the isovector vector channel. It is shown that the match between the OPE and hadronic representations for the sum rules employed is extremely good once one fixes the overall scale, (m(s) - m(u))(2), which normalizes the OPE side. A value m(s)(4 GeV2) = 115 +/- 8 MeV, corresponding to m(s)(1 GeV2) = 159 +/- 11 MeV, is obtained, with theoretical and experimental uncertainties contributing roughly equally to the combined error. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：195 / 202

页数：8

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