Diphoton excess and VV-scattering
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 nontrivial two-particle scattering amplitudes with asymptotic gauge boson states. The longitudinally polarized W± 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 ∼ 1.3 TeV and strong limits on the masses of the underlying vector-like fermions are given.
- Publication:
-
Modern Physics Letters A
- Pub Date:
- July 2016
- DOI:
- 10.1142/S0217732316501339
- arXiv:
- arXiv:1604.01008
- Bibcode:
- 2016MPLA...3150133C
- Keywords:
-
- LHC;
- effective theories;
- perturbative unitarity;
- partial wave;
- 11.10.Ef;
- 12.90.+b;
- Lagrangian and Hamiltonian approach;
- Miscellaneous theoretical ideas and models;
- High Energy Physics - Phenomenology
- E-Print:
- 10 pages, 2 Latex figures, v2 typos corrected, references added, published version