Correlative signatures of heavy Majorana neutrinos and doubly-charged Higgs bosons at the Large Hadron Collider

TL;DR

This paper investigates how signatures of heavy Majorana neutrinos and doubly-charged Higgs bosons, predicted by type-II seesaw models, can be correlated and tested at the LHC through lepton-number-violating processes.

Contribution

It demonstrates the correlated signatures of heavy Majorana neutrinos and doubly-charged Higgs bosons in TeV-scale type-II seesaw models at the LHC, with explicit cross section calculations.

Findings

Correlated lepton-number-violating signatures at the LHC.

Explicit cross section calculations for pp -> l^+ l^+ X processes.

Illustration of nontrivial correlations between heavy neutrinos and Higgs bosons.

Abstract

We explore an intriguing possibility to test the type-II seesaw mechanism of neutrino mass generation at the Large Hadron Collider (LHC). We show that the lepton-number-violating signatures of heavy Majorana neutrinos N_i (for i=1, 2, 3) and doubly-charged Higgs bosons H^++(H^--) can be closely correlated with each other in a class of TeV-scale type-II seesaw models. Taking the minimal version of such models for example, we calculate the cross sections of pp -> l^+_\alpha l^+_\beta X (l^-_\alpha l^-_\beta X) processes mediated separately by N_1 and H^++(H^--), and illustrate their nontrivial correlation at the LHC.