Interpreting $750$ GeV Diphoton Excess with R-parity Violating Supersymmetry

TL;DR

This paper explains the 750 GeV diphoton excess using R-parity violating supersymmetry, proposing the sneutrino as the resonance and analyzing parameter space consistent with experimental data.

Contribution

It introduces a novel supersymmetric model with R-parity violation that enhances diphoton decay rates and identifies specific mass ranges for superpartners compatible with the excess.

Findings

Sneutrino as the 750 GeV resonance produced via quark annihilation

Enhanced diphoton branching ratio in the proposed model

Favored superpartner masses around 375-410 GeV

Abstract

We propose an supersymmetric explanation of the diphoton excess in the Minimal Supersymmetric Standard Model with the leptonic R-parity violation. Where the sneutrino serves as the 750 GeV resonance and produced through quark anti-quark annihilation. With introducing appropriate trilinear soft parameters, we show that the diphoton branching ratio is significantly enhanced compared with the conventional MSSM. The parameter space favored by diphoton excess strongly indicates the mass of smuon and stau fall into the range $375-410$ (375-480) GeV, which depending on the electroweakino masses. In addition, the $R$-parity-violating trilinear couplings involved with second generation quarks are both favored by compatibility of diphoton excess and low-energy constraints.