HADRONIC WIDTH OF THE ZETA FROM A GLOBAL FIT TO E+E--]HADRONS DATA

被引：7

作者：

BRANCHINA, V ^{[1
]}

CASTORINA, P ^{[1
]}

CONSOLI, M ^{[1
]}

ZAPPALA, D ^{[1
]}

机构：

[1] UNIV CATANIA,DIPARTMENTO FIS,I-95124 CATANIA,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.65.3237

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A global analysis of the e + e - --> hadrons data is presented to extract an effective value for the strong-interaction correction to the quark-parton-model approximation to be used for the Z hadronic width. We obtain GAMMA-h = 1782 +/- 17(fit) +/- 15[electroweak (EW) theory] MeV, and a ratio GAMMA-h/GAMMA-l = 21.32 +/- 0.24, in good agreement with the results from the CERN collider LEP, and different from the two-loop QCD predictions, GAMMA-h = 1735 +/- 6(alpha-s) +/- 15(EW theory) MeV and GAMMA-h/GAMMA-l = 20.74 +/- 0.12, corresponding to LAMBDA-MS(5) = 140(-80)+100 MeV, where MSBAR denotes the modified minimal-subtraction scheme.

引用

页码：3237 / 3240

页数：4

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