Falsifying leptogenesis for a TeV scale $W^{\pm}_{R}$ at the LHC

TL;DR

Discovering a TeV-scale right-handed W boson at the LHC would invalidate all leptogenesis scenarios in left-right symmetric models due to rapid B-L violating interactions, regardless of lepton number violation signals.

Contribution

This paper demonstrates that the potential detection of a TeV-scale W_R boson at the LHC rules out leptogenesis in all left-right symmetric models with triplet or doublet Higgs scalars.

Findings

Detection of W_R at TeV scale conflicts with leptogenesis

Fast gauge-mediated B-L violation undermines leptogenesis

Results are independent of lepton number violation signals

Abstract

We point out that the discovery of a right-handed charged gauge boson $W_R^\pm$ with mass of around a few TeV, for example through a signal of two leptons and two jets that has been reported by CMS to have a 2.8$\sigma$ local excess or through a signal of a resonance decaying into a pair of standard model (SM) gauge bosons showing a local excess of 3.4$\sigma$ (2.5$\sigma$ global) reported by ATLAS search, will rule out all possibilities of leptogenesis in all classes of the left-right symmetric extensions of the Standard Model (LRSM) with both triplet and doublet Higgs scalars due to the unavoidable fast gauge mediated $B-L$ violating interactions $e_{R}^{\pm} W_{R}^{\mp} \rightarrow e_{R}^{\mp} W_{R}^{\pm}$. Our conclusions are very general in the sense that they do not necessarily demand for a lepton number violating detection signal of $W_R^\pm$.