Heavy Higgs bosons and the 2 TeV $W^{\prime }$ boson

Abstract

The hints from the LHC for the existence of a $W^{\prime }$ boson of mass around 1.9 TeV point towards a certain $SU(2{)}_L\times SU(2{)}_R\times U(1{)}_{B-L}$ gauge theory with an extended Higgs sector. We show that the decays of the $W^{\prime }$ boson into heavy Higgs bosons have sizable branching fractions. Interpreting the ATLAS excess events in the search for same-sign lepton pairs plus $b$ jets as arising from $W^{\prime }$ cascade decays, we estimate that the masses of the heavy Higgs bosons are in the 400--700 GeV range.

Comments: 22 pages; v2: Eqs. 3.6 and 3.8 corrected, clarifications and references added