Diphoton resonances in a U(1)_{B-L} extension of the minimal supesymmetric standard model

TL;DR

This paper proposes a U(1)_{B-L} extension of the MSSM motivated by a 750 GeV diphoton resonance, predicting four nearly degenerate spin-zero states with distinctive decay channels and widths.

Contribution

It introduces a novel U(1)_{B-L} extension of the MSSM that predicts multiple degenerate scalar resonances with specific decay properties.

Findings

Predicts four degenerate spin-zero resonance states.

Resonances can decay into neutrinos, sneutrinos, Higgs fields, and Higgsinos.

Resonance widths are in the multi-GeV range.

Abstract

Inspired by the 750 GeV diphoton state recently reported by ATLAS and CMS, we propose a U(1)_{B-L} extension of the MSSM which predicts the existence of four spin zero resonance states that are degenerate in mass in the supersymmetric limit. Vector-like fields, a gauge singlet field, as well as the MSSM Higgsinos are prevented from acquiring arbitrary large masses by a U(1) R-symmetry. Indeed, these masses can be considerably lighter than the Z' gauge boson mass. Depending on kinematics the resonance states could decay into right handed neutrinos and sneutrinos, and/or MSSM Higgs fields and Higgsinos with total decay widths in the multi-GeV range.