TRACING CP VIOLATION IN THE PRODUCTION OF TOP-QUARK PAIRS BY MULTIPLE TEV PROTON-PROTON COLLISIONS

被引：108

作者：

BERNREUTHER, W ^{[1
]}

BRANDENBURG, A ^{[1
]}

机构：

[1] STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA

来源：

PHYSICAL REVIEW D | 1994年 / 49卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.49.4481

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the possibilities of searching for nonstandard CP violation in pp --> ttXBAR at multiple TeV collision energies. A general kinematic analysis of the underlying partonic production processes gg --> ttBAR and qqBAR --> ttBAR in terms of their density matrices is given. We evaluate the CP-violating parts of these matrices in two-Higgs-doublet extensions of the standard model (SM) and give results for CP asymmetries at the parton level. We show that these asymmetries can be traced by measuring suitable observables constructed from energies and momenta of the decay products of t and tBAR. We find CP-violating effects to be of the order of 10(-3) and show that possible contaminations induced by SM interactions are safely below the expected signals.

引用

页码：4481 / 4492

页数：12

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