Resonant CP violation due to heavy neutrinos at the LHC

被引：84

作者：

Bray, Simon

Lee, Jae Sik ^{[1
]}

Pilaftsis, Apostolos

机构：

[1] Seoul Natl Univ, Sch Phys, Ctr Theoret Phys, Seoul 151747, South Korea

[2] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

来源：

NUCLEAR PHYSICS B | 2007年 / 786卷 / 1-2期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1016/j.nuclphysb.2007.07.002

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The observed light neutrinos may be related to the existence of new heavy neutrinos in the spectrum of the SM. If a pair of heavy neutrinos has nearly degenerate masses, then CP violation from the interference between tree-level and self-energy graphs can be resonantly enhanced. We explore the possibility of observing CP asymmetries due to this mechanism at the LHC. We consider a pair of heavy neutrinos N-1.2 with masses ranging from 100-500 GeV and a mass-splitting Delta m(N) = m(N2) - m(N1) comparable to their widths Gamma N-1.2. We find that for Delta m(N) similar to Gamma N-1.2, the resulting CP asymmetries can be very large or even maximal and therefore, could potentially be observed at the LHC. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：95 / 118

页数：24

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