Search for New Phenomena in Dijet Angular Distributions in Proton-Proton Collisions at $\sqrt{s}=8$ TeV Measured with the ATLAS Detector

Abstract

A search for new phenomena in LHC proton-proton collisions at a center-of-mass energy of $\sqrt{s}=8$ TeV was performed with the ATLAS detector using an integrated luminosity of 17.3 fb${}^{-1}$. The angular distributions are studied in events with at least two jets; the highest dijet mass observed is 5.5 TeV. All angular distributions are consistent with the predictions of the Standard Model. In a benchmark model of quark contact interactions, a compositeness scale below 8.1 TeV in a destructive interference scenario and 12.0 TeV in a constructive interference scenario is excluded at 95 % CL; median expected limits are 8.9 TeV for the destructive interference scenario and 14.1 TeV for the constructive interference scenario.

arXiv comment4 pages plus author list + cover pages (17 pages total), 1 figures, submitted to PRL, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2014-15/

References in corpus (28)

• The anti-k_t jet clustering algorithm
• A Brief Introduction to PYTHIA 8.1
• Parton distributions for the LHC
• 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
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• Parton distributions with LHC data
• The ATLAS Simulation Infrastructure
• Confidence Level Computation for Combining Searches with Small Statistics
• A General Algorithm for Calculating Jet Cross Sections in NLO QCD
• Dispelling the N^3 myth for the Kt jet-finder
• Multiparton Interactions in Photoproduction at HERA
• Next-to-leading order calculation of three-jet observables in hadron-hadron collision
• Jet energy measurement and its systematic uncertainty in proton-proton collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Three-jet cross sections in hadron-hadron collisions at next-to-leading order
• Search for new particles decaying into dijets in proton-antiproton collisions at sqrt(s) = 1.96 TeV
• Search for New Physics in Dijet Mass and Angular Distributions in pp Collisions at sqrt(s) = 7 TeV Measured with the ATLAS Detector
• Search for Dijet Resonances in 7 TeV pp Collisions at CMS
• Black Holes and Quantum Gravity at the LHC
• Weak radiative corrections to dijet production at hadron colliders
• ATLAS search for new phenomena in dijet mass and angular distributions using pp collisions at sqrt(s)=7 TeV
• Measurement of dijet angular distributions at sqrt{s}=1.96TeV and searches for quark compositeness and extra spatial dimensions
• Search for Quark Contact Interactions in Dijet Angular Distributions in pp Collisions at sqrt(s) = 7 TeV Measured with the ATLAS Detector
• Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at 7 TeV
• Inelastic Black Hole Production and Large Extra Dimensions
• Search for Quark Compositeness with the Dijet Centrality Ratio in pp Collisions at sqrt(s)=7 TeV
• CIJET: a program for computation of jet cross sections induced by quark contact interactions at hadron colliders

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