Electroweak nature of new states via a di-photon resonance: SU(2)$_L$ or just U(1)$_Y$?

The existence of a 750 GeV di-photon spin-0 resonance S would imply the additional presence of new particles beyond the Standard Model, coupling directly to S and electromagnetically charged. For an SU(2)L singlet S, we explore the possibility of probing the SU(2)L and U(1)Y quantum numbers of the new states at the LHC by measuring and constraining the WW, Zγ, and ZZ decays of S. We obtain robust prospects on the required LHC integrated luminosity to discover the new decay modes of S and discuss the implications of these measurements for probing the electroweak nature of the new states. We also discuss the impact of S mixing with the SM Higgs in such probes.

Note:

6 Pages, 5 Figures

electroweak interaction
scalar particle: resonance
two-photon
quantum number
scalar particle: singlet
Higgs particle: mixing
ATLAS
CMS
CERN LHC Coll
numerical calculations

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Electroweak nature of new states via a di-photon resonance: SU(2)L_LL​ or just U(1)Y_YY​?

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Electroweak nature of new states via a di-photon resonance: SU(2) $_L$ or just U(1) $_Y$ ?