CMS-PAS-EXO-21-003

CMS-PAS-EXO-21-003
Probing Majorana neutrinos and the Weinberg operator in the same-charge dimuon channel through vector boson fusion processes in proton-proton collisions at $\sqrt{s}= $ 13 TeV
CMS Collaboration
March 2022

Abstract: A first search probing Majorana neutrinos and the Weinberg operator in vector boson fusion processes at the LHC is presented. The search is performed in the same-charge dimuon final state using a proton-proton collision data set, recorded by the CMS detector, at a center-of-mass energy of 13 TeV and corresponding to a total integrated luminosity of 138 fb$^{-1}$. The final state consists of two well-identified isolated muons with the same charge, and two jets with a large rapidity separation as well as a large dijet mass. The results are found to agree with the predictions of the standard model. Constraints are derived on model parameters accordingly. These limits significantly extend the mass range probed for heavy Majorana neutrinos compared with previous searches at the LHC. They also serve as a first test of the Weinberg operator at colliders.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, PRL 131 (2023) 011803. The superseded preliminary plots can be found here.

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