Di-photon Excess Explained by a Resonant Sneutrino in R-parity Violating Supersymmetry

TL;DR

This paper proposes that a resonant sneutrino in R-parity violating supersymmetry explains the 750 GeV di-photon excess observed by ATLAS and CMS, predicting additional signals in di-jets, WW, and charged slepton decays.

Contribution

It introduces a novel supersymmetric model where a sneutrino explains the di-photon excess and predicts associated signals in other channels.

Findings

Sneutrino decay via stau loop accounts for the di-photon excess.

Predicts additional signals in di-jets and WW channels at 750 GeV.

Foresees a charged slepton decaying into WZ and Wγ at similar mass.

Abstract

We explain the recent excess seen by ATLAS and CMS experiments at around 750 GeV in the di-photon invariant mass as a narrow width sneutrino decaying to di-photons via a stau loop in R-parity violating Supersymmetry. The stau mass is predicted to be somewhere between half the resonant sneutrino mass and half the sneutrino mass plus 14 GeV. The scenario also predicts further signal channels at an invariant mass of 750 GeV, the most promising being into di-jets and $WW$. We also predict a left handed charged slepton decaying into $WZ$ and $W \gamma$ at a mass 750-754 GeV.