Search for new phenomena in photon+jet events collected in proton--proton collisions at s√ = 8 TeV with the ATLAS detector

ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL

PHYSICS LETTERS B

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2014 vol. 231 p. 1 - 23

0370-2693

This Letter describes a model-independent search for the production of new resonances in photon+ jet (γ + jet) events using 20 fb−1 of proton?proton LHC data recorded with the ATLAS detector at a√centre-of-mass energy of s = 8 TeV. The γ+jet mass distribution is compared to a background modelfit from data; no significant deviation from the background-only hypothesis is found. Limits are set at95% credibility level on generic Gaussian-shaped signals and two benchmark phenomena beyondthe Standard Model: non-thermal quantum black holes and excited quarks. Non-thermal quantumblack holes are excluded below masses of 4.6 TeV and excited quarks are excluded below masses of3.5 TeV.