arXiv: High Energy Physics - Phenomenology | 2019
Heavy Higgs Bosons at the LHC Upgrade
Abstract
We evaluate the discovery potential for the heavy Higgs bosons at the LHC energy upgrade with $\\sqrt{s}=27$ TeV. We take degenerate mass spectrum and assume near the alignment limit in the Type-II Two Higgs Doublet Model for illustration. We explore the observability of the heavy neutral Higgs bosons by examining the leading decay channel $H^0/A^0\\to \\tau^+\\tau^-$ and the clean signals from $H^0\\to W^+W^-, ZZ$ via gluon-gluon fusion production. The associated production of a top quark and a charged Higgs boson via $gb\\to t H^\\pm$ is adopted to predict the discovery potential of heavy charged Higgses. We also emphasize the potential importance of the electroweak production of Higgs boson pairs, i.e. $pp\\to W^\\ast \\to H^\\pm A^0$ and $pp\\to Z^\\ast/\\gamma^\\ast \\to H^+ H^-$. They are only governed by pure electroweak gauge couplings and can provide complementary information to the conventional signals in the determination of the nature of the Higgs sector.