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Mono-Higgs-boson: A new collider probe of dark matter

Linda Carpenter1, Anthony DiFranzo2, Michael Mulhearn3, Chase Shimmin2, Sean Tulin4, and Daniel Whiteson2

  • 1Department of Physics and Astronomy, Ohio State University, Columbus Ohio 43210, USA
  • 2Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
  • 3Department of Physics, University of California, Davis, California 95616, USA
  • 4Department of Physics and Astronomy, University of Michigan, Ann Arbor, Michigan 48109, USA

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Phys. Rev. D 89, 075017 – Published 29 April, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.075017

Abstract

We explore the Large Hadron Collider (LHC) phenomenology of dark matter (DM) pair production in association with a 125-GeV Higgs boson. This signature, dubbed “mono-Higgs,” appears as a single Higgs boson plus missing energy from DM particles escaping the detector. We perform an LHC background study for mono-Higgs signals at s=8 and 14 TeV for four Higgs boson decay channels: γγ, bb¯, ZZ*→4ℓ, and ℓℓjj. We estimate the LHC sensitivities to a variety of new physics scenarios within the frameworks of both effective operators and simplified models. For all of these scenarios, the γγ channel provides the best sensitivity, whereas the bb¯ channel suffers from a large tt¯ background. Mono-Higgs is unlike other mono-X searches (X=jet, photon, etc.) since the Higgs boson is unlikely to be radiated as initial state radiation and therefore probes the underlying DM vertex directly.

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Phys. Rev. D 89, 075017– Published 29 April, 2014
  • Received 10 January 2014

© 2014 American Physical Society

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