Photophilic Higgs from sgoldstino mixing
Brando Bellazzini, Christoffer Petersson, Riccardo Torre
TL;DR
This paper explores how a light sgoldstino, mixing with the Higgs boson, can enhance the Higgs to di-photon decay rate without conflicting with experimental constraints, offering a novel supersymmetric explanation.
Contribution
It introduces a model where sgoldstino-Higgs mixing at around 1 TeV can explain the enhanced di-photon signal observed at 125 GeV.
Findings
Sgoldstino mixing can increase Higgs to di-photon rate
Model evades current experimental bounds
No significant impact on other Higgs decay channels
Abstract
The spontaneous breaking of linearly realized N=1 supersymmetry implies the existence of a pseudo-Goldstone fermion, the goldstino, and of its complex scalar superpartner, the sgoldstino. The latter has generically sizable tree-level couplings to Standard Model gauge bosons while its couplings to SM fermions are suppressed. We consider a light sgoldstino, with a mass around 1 TeV, that mixes with a SM-like Higgs scalar at around 125 GeV. We show that such a mixing can enhance the Higgs to di-photon signal rate while evading all the relevant experimental bounds and without significantly affecting the other decay channels.
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