New signatures and limits on R-parity violation from resonant squark production

Abstract

We discuss resonant squark production at the LHC via baryonic $R$-parity violating interactions. The cross section easily exceeds pair-production and a new set of signatures can be used to probe squarks, particularly stops. These include dijet resonances, same-sign top quarks and four-jet resonances with large $b$-jet multiplicities, as well as the possibility of displaced neutralino decays. We use publicly available searches at $\sqrt{s}=8$ TeV and first results from collisions at $\sqrt{s}=13$ TeV to set upper limits on $R$-parity violating couplings, with particular focus on simplified models with light stops and neutralinos. The exclusion reach of these signatures is comparable to $R$-parity-conserving searches, $m_{\tilde{t}}\simeq 500-700$ GeV. In addition, we find that O(1) couplings involving the stop can be excluded well into the multi-TeV range, and stress that new searches for single- and pair-produced four-jet resonances will be necessary to exclude sub-TeV stops for a natural SUSY spectrum with light higgsinos.

v4: fixed arXiv links in references. v3: version to appear in JHEP. References and comments added. 28 pages, 11 figures + appendices

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• Twin Baryogenesis
• Baryogenesis from Oscillations of Charmed or Beautiful Baryons
• Cornering Natural SUSY at LHC Run II and Beyond
• Baryogenesis from B Meson Oscillations
• The ABC of RPV: Classification of R-Parity Violating Signatures at the LHC for Small Couplings
• LHC Signatures of WIMP-triggered Baryogenesis
• LHC phenomenology and baryogenesis in supersymmetric models with a $U(1{)}_R$ baryon number
• Stashing the stops in multijet events at the LHC
• Search for bottom squarks in the baryon-number violating MSSM
• LSP baryogenesis and neutron-antineutron oscillations from R-parity violation
• The least constrained supersymmetry with R-parity violation