Heavy Higgs as a portal to the supersymmetric electroweak sector
Stefania Gori (Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, CA, 95064, U.S.A., Department of Physics, 1156 High St., University of California Santa Cruz, Santa Cruz, CA, 95064, U.S.A.); Zhen Liu (Maryland Center for Fundamental Physics, Department of Physics, University of Maryland, College Park, MD, 20742, U.S.A., Theoretical Physics Department, Fermilab, Batavia, IL, 60510, U.S.A.); Bibhushan Shakya (Leinweber Center for Theoretical Physics, University of Michigan, Ann Arbor, MI, 48109, U.S.A., Department of Physics, University of Cincinnati, Cincinnati, Ohio, 45221, U.S.A., Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, CA, 95064, U.S.A., Department of Physics, 1156 High St., University of California Santa Cruz, Santa Cruz, CA, 95064, U.S.A.)
The electroweak sector of the Minimal Supersymmetric Standard Model (MSSM) — neutralinos, charginos and sleptons — remains relatively weakly constrained at the LHC due in part to the small production cross sections of these particles. In this paper, we study the prospects of searching for decays of heavy Higgs bosons into these superpartners at the high luminosity LHC. In addition to the kinematic handles offered by the presence of a resonant particle in the production chain, heavy Higgs decays can be the dominant production mode of these superpartners, making it possible to extend coverage to otherwise inaccessible regions of the supersymmetry and heavy Higgs parameter space. We illustrate our ideas with detailed collider analyses of two specific topologies: we propose search strategies for heavy Higgs decay to a pair of neutralinos, which can probe heavy Higgs bosons up to 1 TeV in the intermediate tan β(∼2 − 8) region, where standard heavy Higgs searches have no reach. Similarly, we show that targeted searches for heavy Higgs decays into staus can probe stau masses up to several hundred GeV. We also provide a general overview of additional decay channels that might be accessible at the high luminosity LHC. This motivates a broader program for LHC heavy Higgs searches.
