Seesaw at LHC through Left - Right Symmetry

TL;DR

This paper explores how the LHC can investigate the seesaw mechanism for neutrino mass through signatures like lepton number violation and right-handed gauge bosons in Left-Right symmetric theories, linking collider signals to neutrino properties.

Contribution

It demonstrates that LHC can potentially detect right-handed gauge bosons and neutrinos, providing insights into neutrino mass origin and lepton number violation within Left-Right symmetric models.

Findings

Potential detection of W_R gauge boson at a few TeV

LHC measurements of right-handed neutrino masses and mixing

Predictions for neutrinoless double beta decay rates

Abstract

I argue that LHC may shed light on the nature of neutrino mass through the probe of the seesaw mechanism. The smoking gun signature is lepton number violation through the production of same sign lepton pairs, a collider analogy of the neutrinoless double beta decay. I discuss this in the context of L-R symmetric theories, which led originally to neutrino mass and the seesaw mechanism. A W_R gauge boson with a mass in a few TeV region could easily dominate neutrinoless double beta decay, and its discovery at LHC would have spectacular signatures of parity restoration and lepton number violation. Moreover, LHC can measure the masses of the right-handed neutrinos and the right-handed leptonic mixing matrix, which could in turn be used to predict the rates for neutrinoless double decay and lepton flavor violating violating processes. The LR scale at the LHC energies offers great hope of observing these low energy processes in the present and upcoming experiments.