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 root 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. RI Orlov, Ilya/E-6611-2012; valente, paolo/A-6640-2010; Ferrando, James/A-9192-2012; Doyle, Anthony/C-5889-2009; Fazio, Salvatore /G-5156-2010; Alexa, Calin/F-6345-2010; Darbo, Giovanni/C-8175-2012; Gutierrez, Phillip/C-1161-2011; Moorhead, Gareth/B-6634-2009; Livan, Michele/D-7531-2012; Takai, Helio/C-3301-2012; Petrucci, Fabrizio/G-8348-2012; Smirnov, Sergei/F-1014-2011; Wemans, Andre/A-6738-2012; Jones, Roger/H-5578-2011; Fabbri, Laura/H-3442-2012; Kurashige, Hisaya/H-4916-2012; Villa, Mauro/C-9883-2009; Delmastro, Marco/I-5599-2012

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

CALDERINI, GIOVANNI;CAVASINNI, VINCENZO;