Search for Production of Resonant States in the Photon-Jet Mass Distribution Using pp Collisions at s√=7 TeV Collected by the ATLAS Detector

Barton, Adam and Borissov, Guennadi and Bouhova-Thacker, Eva and Brodbeck, Timothy and Chilingarov, Alexandre and de Mora, Lee and Dearnaley, William and Fox, Harald and Henderson, Robert and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin and Love, Peter and Ratoff, Peter and Smizanska, Maria and Walder, James (2012) Search for Production of Resonant States in the Photon-Jet Mass Distribution Using pp Collisions at s√=7  TeV Collected by the ATLAS Detector. Physical review letters, 108 (21). ISSN 1079-7114

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

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Journal Article
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Physical review letters
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Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2012 CERN, for the ATLAS Collaboration
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20 Dec 2013 09:21
Last Modified:
12 Jul 2020 04:34