S-MATRIX APPROACH TO THE Z LINE-SHAPE

被引：85

作者：

LEIKE, A ^{[1
]}

RIEMANN, T ^{[1
]}

ROSE, J ^{[1
]}

机构：

[1] RHEIN WESTFAL HSCH,INST PHYS A 3,W-5100 AACHEN,GERMANY

来源：

PHYSICS LETTERS B | 1991年 / 273卷 / 04期

关键词：

D O I：

10.1016/0370-2693(91)90307-C

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the Z line shape assuming the existence of an analytic, unitary S-matrix. From hadron production at LEP, we determine M(Z) = 91.134 +/- 0.020 +/- 0.020 (LEP) GeV, GAMMA(Z) = 2.506 +/- 0.018 GeV. This is in accordance with earlier results after performing a shift of the Z mass value of about 1/2-GAMMA(Z)2/M(Z) = 34 MeV. The cross section and related observables may be described by a small number of additional degrees of freedom without relying on a specific field-theoretic model. With available data, the experimental error for M(Z) could be lowered using some electroweak model.

引用

页码：513 / 518

页数：6

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