Investigating the jet activity accompanying the production at the LHC of a massive scalar particle decaying into photons

Abstract

We study the jet activity that accompanies the production by gluon fusion of a new physics scalar particle decaying into photons at the LHC. In the considered scenarios, both the production and decay mechanisms are governed by loop-induced interactions involving a heavy colored state. We show that the presence of large new physics contributions to the inclusive diphoton invariant-mass spectrum always implies a significant production rate of non-standard diphoton events containing extra hard jets. We investigate the existence of possible handles that could provide a way to obtain information on the underlying physics behind the scalar resonance, and this in a wide mass window.

arXiv comment7 pages, 10 figures, accepted version to be published in PLB (V2)

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• Heavy photophilic scalar at the LHC from a varying electromagnetic coupling
• Heavy neutral pseudoscalar decays into gauge bosons in the Littlest Higgs Model
• Exclusion limits on a scalar decaying to photons and distinguishing its production mechanisms