Asymmetric Dark Matter Models and the LHC Diphoton Excess

Abstract

The existence of dark matter (DM) and the origin of the baryon asymmetry are persistent indications that the SM is incomplete. More recently, the ATLAS and CMS experiments have observed an excess of diphoton events with invariant mass of about 750 GeV. One interpretation of this excess is decays of a new spin-0 particle with a sizable diphoton partial width, e.g. induced by new heavy weakly charged particles. These are also key ingredients in models cogenerating asymmetric DM and baryons via sphaleron interactions and an initial particle asymmetry. We explore what consequences the new scalar may have for models of asymmetric DM that attempt to account for the similarity of the dark and visible matter abundances.

33 pages, 5 figures

References in corpus (11)

• Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV
• Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
• Updated CMB constraints on Dark Matter annihilation cross-sections
• Mixed dark matter from technicolor
• Halo Independent Direct Detection of Momentum-Dependent Dark Matter
• Annihilating Asymmetric Dark Matter
• Higgs Signals in a Type I 2HDM or with a Sister Higgs
• A dark force for baryons
• On the dependence of QCD splitting functions on the choice of the evolution variable
• Theoretical interpretation of a spin-two diphoton excess
• Confronting dark matter with the diphoton excess from a parent resonance decay

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• Has a Higgs-flavon with a $750$ GeV mass been detected at the LHC13?
• Boosted scalar confronting 750 GeV di-photon excess
• Asymmetric dark matter, baryon asymmetry and lepton number violation
• Symmetries, Dark Matter and Minicharged Particles