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arXiv · 1604.01008

Diphoton excess and VV-scattering

G. Cynolter·J . Kovács·E. Lendvai
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Abstract

We consider minimal effective interactions of the 750 GeV mass resonance observed recently by ATLAS and CMS. Assuming a new scalar and gauge invariant effective interactions leads to non-trivial two particle scattering amplitudes with asymptotic gauge boson states. The longitudinally polarized $W\pm$ and $Z$ bosons interacting via dimension-five effective operators provide stringent constraints on the validity of the effective model. The large width found by ATLAS implying a bound of approximately 500 GeV already below the resonance, turns this scenario unlikely. For production mainly in gluon fusion we get an upper bound of $\sim 1.3$ TeV and strong limits on the masses of the underlying vector-like fermions are given.

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G. Cynolter, J . Kovács, E. Lendvai. 2016-07-11. Diphoton excess and VV-scattering. https://doi.org/10.1142/s0217732316501339

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