Search for production of resonant states in the photon-jet mass distribution using pp collisions at sqrt(s) = 7 TeV collected by the ATLAS detector

Abstract

This Letter describes a model-independent search for production of new resonant states in photon-jet events in 2.11 fb^-1 of proton-proton collisions at sqrt(s) = 7 TeV. We compare the photon-jet mass distribution to a data-driven background estimate and find consistency with the background hypothesis. Given the lack of evidence for a signal, we set 95% CL limits on generic Gaussian-shape signals and on a benchmark excited-quark (q*) model, excluding 2 TeV Gaussian resonances with cross section times branching ratio times acceptance times efficiency near 5 fb and excluding q* masses below 2.46 TeV, respectively.

5 pages plus author list (18 pages total), 3 figures, revised author list, matches Physical Review Letters version

References in corpus (12)

• Parton Distributions for LO Generators
• A new critical study of photon production in hadronic collisions
• Search for New Physics in the Dijet Mass Distribution using 1 fb^-1 of pp Collision Data at sqrt(s) = 7 TeV collected by the ATLAS Detector
• Measurement of the inclusive isolated prompt photon cross-section in pp collisions at sqrt(s)= 7 TeV using 35 pb-1 of ATLAS data
• Measurement of the Differential Cross Section for Isolated Prompt Photon Production in pp Collisions at 7 TeV
• Direct photons as probes of low mass strings at the LHC
• Sensitivity of isolated photon production at TeV hadron colliders to the gluon distribution in the proton
• Photon - Jet Correlations and Constraints on Fragmentation Functions
• Plotting the Differences Between Data and Expectation
• Topological Pions
• Quirks in supersymmetry with gauge coupling unification
• Quark Excitations Through the Prism of Direct Photon Plus Jet at the LHC

Cited by in corpus (10)

• Search for high-mass diphoton resonances in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for Extra Dimensions in diphoton events using proton-proton collisions recorded at sqrt(s) = 7 TeV with the ATLAS detector at the LHC
• Search for new phenomena in photon+jet events collected in proton--proton collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Probing Colored Particles with Photons, Leptons, and Jets
• Search for excited quarks in the photon+jet final state in proton-proton collisions at sqrt(s) = 8 TeV
• Search for new phenomena with photon+jet events in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for single b*-quark production with the ATLAS detector at sqrt(s)=7 TeV
• Search for new phenomena in high-mass final states with a photon and a jet from $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Two Micron-Size Dark Dimensions
• Signature of the $\gamma$+jet and dijet production mediated by an excited quark with QCD next-to-leading order accuracy at the LHC