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.

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

CONTA, CLAUDIO;FRANCHINO, SILVIA;FRATERNALI, MARCO;LIVAN, MICHELE;NEGRI, ANDREA;REBUZZI, DANIELA MARCELLA;RIMOLDI, ADELE;USLENGHI, MASSIMILIANO;
2012-01-01

Abstract

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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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/423334
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