Search for squarks and gluinos in events with hadronically decaying tau leptons, jets and missing transverse momentum in proton-proton collisions at $\sqrt{s}=13$ TeV recorded with the ATLAS detector

Abstract

A search for supersymmetry in events with large missing transverse momentum, jets, and at least one hadronically decaying tau lepton has been performed using 3.2 fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ TeV recorded by the ATLAS detector at the Large Hadron Collider in 2015. Two exclusive final states are considered, with either exactly one or at least two tau leptons. No excess over the Standard Model prediction is observed in the data. Results are interpreted in the context of gauge-mediated supersymmetry breaking and a simplified model of gluino pair production with tau-rich cascade decays, substantially improving on previous limits. In the GMSB model considered, supersymmetry-breaking scale ($\Lambda$) values below 92 TeV are excluded at the 95% confidence level, corresponding to gluino masses below 2000 GeV. For large values of $\tan \beta$, values of $\Lambda$ up to 107 TeV and gluino masses up to 2300 GeV are excluded. In the simplified model, gluino masses are excluded up to 1570 GeV for neutralino masses around 100 GeV. Neutralino masses up to 700 GeV are excluded for all gluino masses between 800 GeV and 1500 GeV, while the strongest exclusion of 750 GeV is achieved for gluino masses around 1400 GeV.

arXiv comment30 pages (plus author list + cover pages: 48 pages total), 9 figures, 9 tables. Submitted to EPJC. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2016-01/

References in corpus (52)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• 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
• Parton distributions for the LHC
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Asymptotic formulae for likelihood-based tests of new physics
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• The ATLAS Simulation Infrastructure
• Scattering Amplitudes with Open Loops
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Comix, a new matrix element generator
• Tuning Monte Carlo Generators: The Perugia Tunes
• QCD matrix elements + parton showers: The NLO case
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• SPheno 3.1: extensions including flavour, CP-phases and models beyond the MSSM
• Measuring masses of semi-invisibly decaying particles pair produced at hadron colliders
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• Muon reconstruction performance of the ATLAS detector in proton--proton collision data at $\sqrt{s}$=13 TeV
• Parton distributions with QED corrections
• Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1
• Performance of pile-up mitigation techniques for jets in $pp$ collisions at $\sqrt{s}=8$ TeV using the ATLAS detector
• Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector at the LHC
• Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV
• Squark and Gluino Production at Hadron Colliders
• Threshold resummation for squark-antisquark and gluino-pair production at the LHC
• Squark and gluino hadroproduction
• Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC
• Soft-gluon resummation for squark and gluino hadroproduction
• Correcting the Colour-Dipole Cascade Model with Fixed Order Matrix Elements
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• HistFitter software framework for statistical data analysis
• Supersymmetry Without Prejudice
• Colour reconnections in Herwig++
• Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using 4.7 fb^-1 of sqrt(s) = 7 TeV proton-proton collision data
• New formalism for QCD parton showers
• Supersymmetry production cross sections in pp collisions at sqrt{s} = 7 TeV
• Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment in $pp$ collisions at $\sqrt{s}$=8 TeV
• Summary of the searches for squarks and gluinos using $\sqrt{s}$ = 8 TeV pp collisions with the ATLAS experiment at the LHC
• Bisection-based asymmetric MT2 computation: a higher precision calculator than existing symmetric methods
• Search for physics beyond the standard model in events with tau leptons, jets, and large transverse momentum imbalance in pp collisions at sqrt(s) = 7 TeV
• The Minimal Supersymmetric Standard Model: Group Summary Report
• Search for supersymmetry in events with large missing transverse momentum, jets, and at least one tau lepton in 20 fb${}^{-1}$ of $\sqrt{s}$=8 TeV proton-proton collision data with the ATLAS detector
• Revisiting light neutralino scenarios in the MSSM
• TauSpinner program for studies on spin effect in tau production at the LHC
• Search for Supersymmetry in Events with Large Missing Transverse Momentum, Jets, and at Least One Tau Lepton in 7 TeV Proton-Proton Collision Data with the ATLAS Detector

Cited by in corpus (8)

• Constraints on Supersymmetric Dark Matter for Heavy Scalar Superpartners
• Search for squarks and gluinos in final states with hadronically decaying $\tau$-leptons, jets, and missing transverse momentum using $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Documentation of TauSpinner algorithms -- program for simulating spin effects in tau-lepton production at LHC
• Non-Leptonic Decays of Bileptons
• Low-scale Gauge Mediation after LHC Run 2
• Statistical biases in measurements with multiple candidates
• Search strategy for gluinos at the LHC with a Higgs boson decaying into tau leptons
• Search for squarks and gluinos in $pp$ collisions at $\sqrt{s}=13$ TeV and $13.6$ TeV in events with $\tau$-leptons, jets and missing transverse momentum using the ATLAS detector