Digging Deeper for New Physics in the LHC Data

Abstract

In this paper we describe a novel, model-independent technique of "rectangular aggregations" for mining the LHC data for hints of new physics. A typical (CMS) search now has hundreds of signal regions, which can obscure potentially interesting anomalies. Applying our technique to the two CMS jets+MET SUSY searches, we identify a set of previously overlooked $\sim 3\sigma$ excesses. Among these, four excesses survive tests of inter- and intra-search compatibility, and two are especially interesting: they are largely overlapping between the jets+MET searches and are characterized by low jet multiplicity, zero $b$-jets, and low MET and $H_T$. We find that resonant color-triplet production decaying to a quark plus an invisible particle provides an excellent fit to these two excesses and all other data -- including the ATLAS jets+MET search, which actually sees a correlated excess. We discuss the additional constraints coming from dijet resonance searches, monojet searches and pair production. Based on these results, we believe the wide-spread view that the LHC data contains no interesting excesses is greatly exaggerated.

31 pages + appendices, 14 figures, source code for recasted searches attached as auxiliary material

References in corpus (30)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• Parton distributions for the LHC
• Asymptotic formulae for likelihood-based tests of new physics
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• Identifying Boosted Objects with N-subjettiness
• Measuring masses of semi-invisibly decaying particles pair produced at hadron colliders
• Matching matrix elements and shower evolution for top-quark production in hadronic collisions
• m_T2 : the truth behind the glamour
• Trial factors for the look elsewhere effect in high energy physics
• Recombination Algorithms and Jet Substructure: Pruning as a Tool for Heavy Particle Searches
• Naturalness and the Status of Supersymmetry
• On measuring the masses of pair-produced semi-invisibly decaying particles at hadron colliders
• Search for supersymmetry in multijet events with missing transverse momentum in proton-proton collisions at 13 TeV
• Search for new phenomena with the MT2 variable in the all-hadronic final state produced in proton-proton collisions at sqrt(s) = 13 TeV
• Toward Full LHC Coverage of Natural Supersymmetry
• Bisection-based asymmetric MT2 computation: a higher precision calculator than existing symmetric methods
• LHC Coverage of RPV MSSM with Light Stops
• Supersymmetric particle mass measurement with the boost-corrected contransverse mass
• Twin Baryogenesis
• Beyond the Minimal Supersymmetric Standard Model: from theory to phenomenology
• Revisiting fine-tuning in the MSSM
• Cornering Natural SUSY at LHC Run II and Beyond
• Top-squark in natural SUSY under current LHC run-2 data
• Phenomenological MSSM in light of new 13 TeV LHC data
• Precision Corrections to Fine Tuning in SUSY
• LHC phenomenology and baryogenesis in supersymmetric models with a $U(1{)}_R$ baryon number
• LHC searches examined via the RPV MSSM

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• Learning New Physics from a Machine
• Guiding New Physics Searches with Unsupervised Learning
• Searches for physics beyond the standard model with the $M_{T2}$ variable in hadronic final states with and without disappearing tracks in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Searching for Leptoquarks at Future Muon Colliders
• A SModelS interface for pyhf likelihoods
• Unsupervised Hadronic SUEP at the LHC
• Learning new physics efficiently with nonparametric methods
• Learning Multivariate New Physics
• B Anomalies and Leptoquarks at the LHC: Beyond the Lepton-Quark Final State
• An Update on the LHC Monojet Excess
• Production of a light top-squark pair in association with a light non-standard Higgs boson within the NMSSM at the 13 TeV LHC and a 33 TeV proton collider
• Long-lived bi$\mathbf{\nu }$o at the LHC