Lepton number violating processes mediated by Majorana neutrinos at hadron colliders

被引:37
|
作者
Kovalenko, Sergey [1 ,2 ]
Lu, Zhun [1 ,2 ]
Schmidt, Ivan [1 ,2 ]
机构
[1] Univ Tecn Federico Santa Maria, Dept Fis, Casilla 110-V, Valparaiso, Chile
[2] Ctr Subatom Phys, Valparaiso, Chile
来源
PHYSICAL REVIEW D | 2009年 / 80卷 / 07期
关键词
NEUTRAL HEAVY-LEPTONS; STERILE NEUTRINOS; RESONANCES; BEHAVIOR; SEARCH; MASSES; LIMITS; DECAY;
D O I
10.1103/PhysRevD.80.073014
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study the lepton number violating like-sign dilepton processes h(1)h(2) -> l(+/-)l'(+/-)jjX and h(1)h(2) -> l(+/-)l'(WX)-W-+/--X-+/-, mediated by heavy GeV scale Majorana neutrinos. We focus on the resonantly enhanced contributions with a nearly on-mass-shell Majorana neutrino in the s channel. We study the constraints on like-sign dilepton production at the Tevatron and the LHC on the basis of the existing experimental limits on the masses of heavy neutrinos and their mixings U-alpha N with alpha = nu(e), nu(mu), nu(tau). Special attention is paid to the constraints from neutrinoless double beta decay. We note that searches for like-sign e(+/-)e(+/-) events at Tevatron and LHC may provide evidence of CP violation in the neutrino sector. We also discuss the conditions under which it is possible to extract individual constraints on the mixing matrix elements in a model independent way.
引用
收藏
页数:10
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