Keung-Senjanovi\'c process at LHC: from LNV to displaced vertices to invisible decays

TL;DR

This paper analyzes the potential of current and future colliders to detect right-handed W_R bosons and heavy neutrinos in Left-Right symmetric models, covering various decay signatures from prompt to invisible.

Contribution

It introduces a multi-binned sensitivity measure to comprehensively estimate collider reach across all heavy neutrino mass regimes in Left-Right symmetry models.

Findings

LHC sensitivity ranges from 5 to over 7 TeV with 300/fb.

Future colliders at 33 and 100 TeV extend reach to 12 and 26 TeV.

Sensitivity covers prompt, displaced, and invisible neutrino decay regions.

Abstract

In the context of Left-Right symmetry, we revisit the Keung-Senjanovi\'{c} production of right-handed $W_R$ bosons and heavy neutrinos $N$ at high energy colliders. We develop a multi-binned sensitivity measure and use it to estimate the sensitivity for the entire range of $N$ masses, spanning the standard and merged prompt signals, displaced vertices and the invisible $N$ region. The estimated sensitivity of the LHC with 300/fb integrated luminosity ranges from 5 to beyond 7 TeV, while the future 33(100) TeV collider's reach with 3/ab extends to 12(26) TeV.