Precision tools and models to narrow in on the 750 GeV diphoton resonance

Abstract

The hints for a new resonance at 750 GeV from ATLAS and CMS have triggered a significant amount of attention. Since the simplest extensions of the standard model cannot accommodate the observation, many alternatives have been considered to explain the excess. Here we focus on several proposed renormalisable weakly-coupled models and revisit results given in the literature. We point out that physically important subtleties are often missed or neglected. To facilitate the study of the excess we have created a collection of 40 model files, selected from recent literature, for the Mathematica package SARAH. With SARAH one can generate files to perform numerical studies using the tailor-made spectrum generators FlexibleSUSY and SPheno. These have been extended to automatically include crucial higher order corrections to the diphoton and digluon decay rates for both CP-even and CP-odd scalars. Additionally, we have extended the UFO and CalcHep interfaces of SARAH, to pass the precise information about the effective vertices from the spectrum generator to a Monte-Carlo tool. Finally, as an example to demonstrate the power of the entire setup, we present a new supersymmetric model that accommodates the diphoton excess, explicitly demonstrating how a large width can be obtained. We explicitly show several steps in detail to elucidate the use of these public tools in the precision study of this model.

184 pages, 24 figures; model files available at http://sarah.hepforge.org/Diphoton_Models.tar.gz; v2: added a few clarifications and references

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Cited by in corpus (24)

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• Perturbativity Constraints in BSM Models
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• Dark matter candidates in the constrained Exceptional Supersymmetric Standard Model
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• Unitarity constraints in triplet extensions beyond the large s limit
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• Learning from the New Higgs-like Scalar before It Vanishes
• Light sterile neutrinos, dark matter, and new resonances in a $U(1)$ extension of the MSSM
• A broad 750 GeV diphoton resonance? Not alone
• Diphoton signal via Chern-Simons interaction in a warped geometry scenario
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• Phenomenology of an $SU(2{)}_1\times SU(2{)}_2\times U(1{)}_Y$ model at the LHC
• Spin-$0^{\pm }$ portal induced Dark Matter
• Doubly cvharged vector leptons and the Higgs portal
• Sum-rule constraints on possible diphoton resonances at LHC
• Multi-step production of a diphoton resonance