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arXiv · 1512.06878

The LHC diphoton resonance from gauge symmetry

Sofiane M. Boucenna·Stefano Morisi·Avelino Vicente
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Abstract

Motivated by what is possibly the first sign of new physics seen at the LHC, the diphoton excess at $750$ GeV in ATLAS and CMS, we present a model that provides naturally the necessary ingredients to explain the resonance. The simplest phenomenological explanation for the diphoton excess requires a new scalar state, $X(750)$, as well as additional vector-like (VL) fermions introduced in an ad-hoc way in order to enhance its decays into a pair of photons and/or increase its production cross-section. We show that the requiered VL quarks and their couplings can emerge naturally from a complete framework based on the $SU(3)_L \otimes U(1)_\mathcal{X}$ gauge symmetry.

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Sofiane M. Boucenna, Stefano Morisi, Avelino Vicente. 2016-06-10. The LHC diphoton resonance from gauge symmetry. https://doi.org/10.1103/physrevd.93.115008

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