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

G. Aad, Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, John Renner Hansen, Jørn Dines Hansen, Simon Johann Franz Heisterkamp, Nele Maria Philomena Boelaert, Morten Dam Jørgensen, Esben Bryndt Klinkby, Sascha Mehlhase, Troels Christian Petersen, Björn Stefan Nilsson, Stefania Xella, Ask Emil Løvschall-Jensen

17 Citationer (Scopus)

Abstract

This Letter describes a model-independent search for the production of new resonant states in photon+jet events in 2.11fb-1 of proton-proton collisions at √s=7TeV. 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.

OriginalsprogEngelsk
TidsskriftPhysical Review Letters
Vol/bind108
Udgave nummer21
Sider (fra-til)211802
Antal sider18
ISSN0031-9007
DOI
StatusUdgivet - 22 maj 2012

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