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
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KünyeAad, G, Abbott, B., Abdallah, J., Abdelalim, A.A., Abdesselam, A., Abdinov, O. ... ATLAS Collaboration. (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. Physical Review Letters, 108 (21), 18p. http://dx.doi.org/10.1103/PhysRevLett.108.211802.
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.