Discovering heavy U(1)-gauged Higgs bosons at the HL-LHC

Abstract

We determine the discovery potential of the Large Hadron Collider (LHC) at 13 TeV center-of-mass energy for a heavy scalar resonance in the dilepton channel. In particular, we consider the singlet-like heavy mass eigenstate of a mixed two Higgs doublet and scalar singlet model in the U (1)B−L extension of the Standard Model. We find that, despite the small coupling of the singlet scalar with the doublets, this heavy scalar can be discovered with 5σ at the LHC with integrated luminosities of ∼ 300 to 1400 fb −1 in the mass range between 500 GeV and 1 TeV.

Right-handed neutrino dark matter, neutrino masses, and non-standard cosmology in a 2HDM

“…Moreover, 2HDM offer a rich environment for new physics in the sector of Higgs physics [55][56][57][58][59][60], collider searches [61], and flavor physics [62][63][64]. Over the years, extensions to the original proposal have appeared that include the introduction of additional new gauge symmetries [65][66][67][68][69][70][71][72][73][74][75][76][77][78][79]. Later, these new gauge symmetries were used to simultaneously solve the flavor problem in 2HDM and the issue of neutrino masses and mixing [50,[80][81][82], as well as the dark matter puzzle [14,[83][84][85][86][87].…”