IPPP-16-54
DCPT-16-108
arXiv:1606.09177
Eur.Phys.J. C76 (2016) 501

by: Chisholm, Andrew S. (Birmingham U.) et al.

Abstract:
We evaluate the LHC’s potential of observing Higgs boson decays into light elementary or composite resonances through their hadronic decay channels. We focus on the Higgs boson production processes with the largest cross sections, $pp \rightarrow h$ and $pp \rightarrow h+\mathrm {jet}$ , with subsequent decays $h \rightarrow ZA$ or $h \rightarrow Z\,\eta _c$ , and comment on the production process $pp \rightarrow hZ$ . By exploiting track-based jet substructure observables and extrapolating to $3000~\mathrm {fb}^{-1}$ we find $\mathcal{BR}(h \rightarrow ZA) \simeq \mathcal{BR}(h \rightarrow Z \eta _c) \lesssim 0.02$ at 95 % CL. We interpret this limit in terms of the 2HDM Type 1. We find that searches for $h\rightarrow ZA$ are complementary to existing measurements and can constrain large parts of the currently allowed parameter space.