New Physics at 1 TeV?

Abstract

If decays of a heavy particle S are responsible for the diphoton excess with invariant mass 750 GeV observed at the 13 TeV LHC run, it can be easily accomodated in the Standard Model. Two scenarios are considered: production in gluon fusion through a loop of heavy isosinglet quark(s) and production in photon fusion through a loop of heavy isosinglet leptons. In the second case many heavy leptons are needed or/and they should have large electric charges in order to reproduce experimental data on $\sigma (pp\to SX)\cdot \mathrm{Br}(S\to \gamma \gamma )$.

7 pages, 4 figures, 1 table

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• Big-Bang Nucleosynthesis
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Cited by in corpus (13)

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• Models of LHC Diphoton Excesses Valid up to the Planck scale
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• The 750 GeV diphoton excess in a two Higgs doublet model and a singlet scalar model, with vector-like fermions, unitarity constraints, and dark matter implications
• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Learning from the New Higgs-like Scalar before It Vanishes
• Minimal Dilaton Model and the Diphoton Excess
• Boosted scalar confronting 750 GeV di-photon excess
• A spartan model for the LHC diphoton excess
• Modified top quark condensation model with the extra heavy fermion, the $125$ GeV Pseudo - Goldstone boson, and the additional heavy scalar bosons