Search for Charged Higgs bosons via decays to $W^{\pm }$ and a 125 GeV Higgs at the Large Hadron Collider

Abstract

The recent observation of a 125 GeV neutral Higgs boson ($H_{\mathrm{obs}}$) provides additional input for charged Higgs boson searches in the $H^{\pm }\to W^{\pm }{H}_{\mathrm{obs}}$ decay channel at the Large Hadron Collider (LHC). We reassess the discovery potential in this channel, which is important for $H^{\pm }$ heavier than the top quark mass. When $H_{\mathrm{obs}}$ decays to a $b\bar{b}$ pair, knowledge of the Higgs mass aids in the kinematic selection of signal events. We perform a signal-to-background analysis to demonstrate the LHC prospects for charged Higgs discovery in the resulting channel $pp\to t(\bar{b})H^{-}\to {\ell }^{\pm }{\nu }_{\ell }jjbb\bar{b}(\bar{b})$+h.c. for standard (300 fb${}^{-1}$) and high (3000 fb${}^{-1}$) luminosities at design energy, $\sqrt{s}=14\mathrm{TeV}$. We find that regions of the parameter space of several two-Higgs doublet models, consistent with constraints from LHC Higgs searches and $b$-physics observables, are testable in this channel.

Comments: 6 pages, 2 figures; Proceedings of "Prospects for Charged Higgs Discovery at Colliders (CHARGED 2014)", 16-18 September 2014, Uppsala, Sweden