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Measuring CP violation in rare $W$ decays at the LHC
- Publication Year :
- 2022
-
Abstract
- Heavy Majorana neutrinos beyond the standard model can simultaneously explain the origin of tiny neutrino masses and matter-antimatter asymmetry in our Universe. The existence of heavy Majorana neutrinos will also lead to lepton number violation and the rare lepton-number-violating $W$ decays are possible. With contributions from two different Majorana neutrinos, a nonzero CP asymmetry may be generated from the rate difference between $W$ decay and its CP-conjugate process. The aim of this paper is to investigate the prospects for measuring CP violation in rare $W$ decays via Majorana neutrinos at the LHC. Our calculations show that the induced CP asymmetry is independent of the Majorana neutrino mass for $10~ \rm GeV < m_N < 70 ~\rm GeV$. Such a CP asymmetry if observed, would in turn provide unambiguous evidence of new physics beyond the standard model.<br />Comment: 15 pages,6 Figures, 1 Table
- Subjects :
- High Energy Physics - Phenomenology
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2203.13454
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1674-1137/ac7eb2