Top quark and leptonic charge asymmetries for the Tevatron and LHC

被引：131

作者：

Bernreuther, Werner ^{[1
]}

Si, Zong-Guo ^{[2
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Phys, D-52056 Aachen, Germany

[2] Shandong Univ, Dept Phys, Jinan 250100, Shandong, Peoples R China

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 03期

关键词：

PAIR PRODUCTION; DISTRIBUTIONS; COLLISIONS; QCD;

D O I：

10.1103/PhysRevD.86.034026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute, for t (t) over bar production at the LHC and at the Tevatron, several charge asymmetries to next-toleading order QCD, including also the electromagnetic and weak-interaction corrections. We calculate these asymmetries both inclusively and with additional kinematic cuts and compare our results, where possible, with recent experimental results and with Standard Model (SM) predictions. The t (t) over bar asymmetries induce also corresponding asymmetries for the charged leptons from semileptonic top-quark decay. Although these asymmetries are, in the SM, smaller than the corresponding ones for top quarks, they are expected to be measurable quite precisely. In fact, measurement of a lepton asymmetry in l + jets events was reported by the D0 [Phys. Rev. D 84, 112005 (2011)] and CDF [CDF Report No. 10807 (unpublished)] experiments. We analyze and compute to next-to-leading order in the gauge couplings leptonic charge asymmetries for dileptonic and semileptonic t (t) over bar events, with and without acceptance cuts, at the Tevatron and the LHC.

引用

页数：13

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