Probing Heavy Majorana Neutrinos and the Weinberg Operator through Vector Boson Fusion Processes in Proton-Proton Collisions at √s = 13  TeV

Physical Review Letters 2023
Kārlis Dreimanis, Antra Gaile, Andris Potrebko, Toms Torims, Viesturs Veckalns, CMS Collaboration

The first search exploiting the vector boson fusion process to probe heavy Majorana neutrinos and the Weinberg operator at the LHC is presented. The search is performed in the same-sign dimuon final state using a proton-proton collision dataset recorded at s=13  TeV, collected with the CMS detector and corresponding to a total integrated luminosity of 138  fb−1. The results are found to agree with the predictions of the standard model. For heavy Majorana neutrinos, constraints on the squared mixing element between the muon and the heavy neutrino are derived in the heavy neutrino mass range 50 GeV–25 TeV; for masses above 650 GeV these are the most stringent constraints from searches at the LHC to date. A first test of the Weinberg operator at colliders provides an observed upper limit at 95% confidence level on the effective μμ Majorana neutrino mass of 10.8 GeV.

DOI
10.1103/PhysRevLett.131.011803
Hyperlink
https://link.aps.org/doi/10.1103/PhysRevLett.131.011803

The CMS Collaboration, A.Tumasyan, K.Dreimanis, A.Gaile, A.Potrebko, T.Torims, V.Veckalns ... [et al.]. Probing Heavy Majorana Neutrinos and the Weinberg Operator through Vector Boson Fusion Processes in Proton-Proton Collisions at √s = 13  TeV. Physical Review Letters, 2023, Vol. 131, No. 1, Article number 011803. ISSN 0031-9007. e-ISSN 1079-7114. Pieejams: doi:10.1103/PhysRevLett.131.011803

Publication language
English (en)