R-parity violation and 8 TeV four-jet events at the LHC

The CMS Collaboration at the Large Hadron Collider (LHC) has observed two four-jet events with a total invariant mass of about 8 TeV; within each event, the jets can be paired into two dijets with invariant masses of 2 TeV each. These are extremely rare events due to the large invariant mass, which implies a very small QCD background, as well as to the di-jet structure, which makes it prone to an interpretation in terms of a heavy resonance decaying into two lighter ones. We investigate the possible interpretation of these events in terms of supersymmetry with a single baryon-number and R-Parity violating term. In this particular scenario, the lighter resonances are identified with the right-handed squarks of the first generation, while the heavy one is interpreted in terms of a down-squark of the second or third generation. We discuss the constraints that shape this interpretation and outline a well-defined scenario for its realization. The resulting predictions can be scrutinized with forthcoming LHC data.

💡 Research Summary

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The CMS Collaboration has reported two striking four‑jet events in 13 TeV proton‑proton collisions, each with a total invariant mass around 8 TeV and a clear sub‑structure: the four jets can be grouped into two dijet pairs, each with an invariant mass of roughly 2 TeV. Because the QCD background falls steeply at such high masses, these events are exceptionally rare and invite an interpretation in terms of resonant production of a heavy particle that decays into two lighter resonances.

In this paper the authors propose a minimal supersymmetric model with a single baryon‑number‑violating, R‑parity‑violating (RPV) operator of the U D D type, \