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Future collider signatures of the possible 750 GeV state

Journal of High Energy Physics volume 2016, Article number: 205 (2016) Cite this article

A preprint version of the article is available at arXiv.

Abstract

If the recent indications of a possible state Φ with mass ~ 750 GeV decaying into two photons reported by ATLAS and CMS in LHC collisions at 13 TeV were to become confirmed, the prospects for future collider physics at the LHC and beyond would be affected radically, as we explore in this paper. Even minimal scenarios for the Φ resonance and its γγ decays require additional particles with masses \( \gtrsim \frac{1}{2}{m}_{\Phi} \). We consider here two benchmark scenarios that exemplify the range of possibilities: one in which Φ is a singlet scalar or pseudoscalar boson whose production and γγ decays are due to loops of coloured and charged fermions, and another benchmark scenario in which Φ is a superposition of (nearly) degenerate CP-even and CP-odd Higgs bosons in a (possibly supersymmetric) two-Higgs doublet model also with additional fermions to account for the γγ decay rate. We explore the implications of these benchmark scenarios for the production of Φ and its new partners at colliders in future runs of the LHC and beyond, at higher-energy pp colliders and at e + e − and γγ colliders, with emphasis on the bosonic partners expected in the doublet scenario and the fermionic partners expected in both scenarios.

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  1. Laboratoire de Physique Théorique, CNRS and Université Paris-Sud, Bât. 210, F-91405, Orsay Cedex, France

    Abdelhak Djouadi

  2. Theory Department, CERN, CH 1211, Geneva 23, Switzerland

    Abdelhak Djouadi & John Ellis

  3. Theoretical Particle Physics & Cosmology Group, Department of Physics, King’s College, Strand, London, WC2R 2LS, U.K.

    John Ellis & Jérémie Quevillon

  4. Center for High Energy Physics, Indian Institute of Science, Sir C.V Raman Marg, Bangalore, 560 012, India

    Rohini Godbole

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  1. Abdelhak Djouadi
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  4. Jérémie Quevillon
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Correspondence to Jérémie Quevillon.

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Djouadi, A., Ellis, J., Godbole, R. et al. Future collider signatures of the possible 750 GeV state. J. High Energ. Phys. 2016, 205 (2016). https://doi.org/10.1007/JHEP03(2016)205

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Keywords

  • Phenomenological Models
  • Supersymmetry Phenomenology