Sensitivity to Majorana neutrinos in ΔL=2 decays of Bc meson at LHCb

被引：44

作者：

Milanes, Diego ^{[1
]}

Quintero, Nestor ^{[2
]}

Vera, Carlos E. ^{[2
]}

机构：

[1] Univ Nacl Colombia, Dept Fis, Bogota 11001, Colombia

[2] Univ Tolima, Dept Fis, Fac Ciencias, Ibague 730006299, Colombia

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 09期

关键词：

LEPTON-NUMBER; STERILE NEUTRINOS; UPPER-BOUNDS; DARK-MATTER; SEARCH; TAU; VIOLATION; MASSES; FLAVOR; VMSM;

D O I：

10.1103/PhysRevD.93.094026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The possible existence of Majorana neutrinos can be tested through the study of processes where the total lepton number L is violated by two units (Delta L = 2). In this work, the production of an on-shell Majorana neutrino with a mass around similar to 0.2 GeV to a few GeV is studied in Delta L = 2 decays of the B-c meson. We focus on the same-sign di-muon channels: three-body B-c(-) -> pi(+)mu(-)mu(-) and four-body B-c(-) -> J/psi pi(+)mu(-)mu(-) and their experimental sensitivity at the LHCb. In both channels, we find that sensitivities on the branching fraction of the order less than or similar to 10(-7) (10(-8)) might be accessible at the LHC run 2 (future LHC run 3), allowing us to set additional and complementary constraints on the parameter space associated with the mass and mixings of the Majorana neutrino. In particular, bounds can be obtained on the mixing vertical bar V-mu N vertical bar(2) similar to O(10(-5)-10(-4)) that are similar or better that the ones obtained from heavy meson Delta L = 2 decays: D-(s)(-) -> pi(+)mu(-)mu(-) and B- -> pi(+)mu(-)mu(-)(D-0 pi(+)mu(-)mu(-)).

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