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arXiv · 1512.06562

Scalar Explanation of Diphoton Excess at LHC

Huayong Han·Shaoming Wang·Sibo Zheng
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Abstract

Inspired by the diphoton signal excess observed in the latest data of 13 TeV LHC, we consider either a 750 GeV real scalar or pseudo-scalar responsible for this anomaly. We propose a concrete vector-like quark model, in which the vector-like fermion pairs directly couple to this scalar via Yukawa interaction. For this setting the scalar is mainly produced via gluon fusion, then decays at the one-loop level to SM diboson channels $gg, γγ, ZZ, WW$. We show that for the vector-like fermion pairs with exotic electric charges, such model can account for the diphoton excess and is consistent with the data of 8 TeV LHC simultaneously in the context of perturbative analysis.

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Huayong Han, Shaoming Wang, Sibo Zheng. 2016-04-02. Scalar Explanation of Diphoton Excess at LHC. https://doi.org/10.1016/j.nuclphysb.2016.04.002

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