MEASUREMENT OF THE E+E- INVARIANT-MASS DISTRIBUTION IN PBARP COLLISIONS AT SQUARE-ROOT S= 1.8 TEV

被引：42

作者：

ABE, F

机构：

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.67.2418

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the cross section as a function of invariant mass for isolated electron pairs produced in ppBAR collisions at square-root s = 1.8 TeV for pair masses M > 30 GeV/c2. We find good agreement between the measured distribution and the standard-model prediction for the Drell-Yan production mechanism. Additional heavy neutral vector bosons (Z') are excluded for M(Z') < 387 GeV/c2 (95% confidence level) assuming standard-model couplings. A lower limit of 2.2 TeV (95% confidence level) is placed on the electron-quark compositeness scale parameter LAMBDA-LLBAR associated with an effective contact interaction.

引用

页码：2418 / 2422

页数：5

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