Search for high-mass new phenomena in the dilepton final state using proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

A search is conducted for both resonant and non-resonant high-mass new phenomena in dielectron and dimuon final states. The search uses 3.2 fb${}^{-1}$ of proton-proton collision data, collected at $\sqrt{s}=13$ TeV by the ATLAS experiment at the LHC in 2015. The dilepton invariant mass is used as the discriminating variable. No significant deviation from the Standard Model prediction is observed; therefore limits are set on the signal model parameters of interest at 95% credibility level. Upper limits are set on the cross-section times branching ratio for resonances decaying to dileptons, and the limits are converted into lower limits on the resonance mass, ranging between 2.74 TeV and 3.36 TeV, depending on the model. Lower limits on the $\ell \ell qq$ contact interaction scale are set between 16.7 TeV and 25.2 TeV, also depending on the model.

arXiv comment18 pages plus author list + cover pages (35 pages total), 4 figures, 4 tables, published by Phys. Lett. B. All figures, including auxiliary figures, are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2015-07

References in corpus (43)

• A Large Mass Hierarchy from a Small Extra Dimension
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• 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
• Parton distributions for the LHC Run II
• Phenomenology, Astrophysics and Cosmology of Theories with Sub-Millimeter Dimensions and TeV Scale Quantum Gravity
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• Parton distributions with LHC data
• The ATLAS Simulation Infrastructure
• PDF4LHC recommendations for LHC Run II
• New parton distribution functions from a global analysis of quantum chromodynamics
• Scattering Amplitudes with Open Loops
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• The Physics of Heavy Z' Gauge Bosons
• 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
• 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
• Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector at the LHC
• Measurement of the $Z/{\gamma }^{\ast }$ boson transverse momentum distribution in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Orientifold theory dynamics and symmetry breaking
• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Parton distributions incorporating QED contributions
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• BAT - The Bayesian Analysis Toolkit
• Electron efficiency measurements with the ATLAS detector using 2012 LHC proton-proton collision data
• The RooFit toolkit for data modeling
• Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at sqrt(s) = 8 TeV
• The RooStats Project
• Black Holes and Quantum Gravity at the LHC
• A meta-analysis of parton distribution functions
• On hypothesis testing, trials factor, hypertests and the BumpHunter
• NLO EW and QCD proton-proton cross section calculations with mcsanc-v1.01
• Search for contact interactions and large extra dimensions in the dilepton channel using proton-proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Proposal for chiral bosons search at LHC via their unique new signature
• Updates of PDFs for the 2nd LHC run

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