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Type: Journal article
Title: A search for new physics in dijet mass and angular distributions in pp collisions at pp √s= 7 TeV measured with the ATLAS detector
Other Titles: A search for new physics in dijet mass and angular distributions in pp collisions at pp root s= 7 TeV measured with the ATLAS detector
Author: Aad, G.
Citation: New Journal of Physics, 2011; 13(5):053044
Publisher: Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft
Issue Date: 2011
ISSN: 1367-2630
Statement of
G. Aad, B. Abbott … Paul D. Jackson … Lawrence Lee-Jr … Andreas Petridis … Martin White … et al. (ATLAS Collaboration)
Abstract: A search for new interactions and resonances produced in LHC proton–proton (pp) collisions at a centre-of-mass energy \sqrt{s}=7\,\textrm{TeV} was performed with the ATLAS detector. Using a dataset with an integrated luminosity of 36 pb− 1, dijet mass and angular distributions were measured up to dijet masses of ~3.5 TeV and were found to be in good agreement with Standard Model predictions. This analysis sets limits at 95% CL on various models for new physics: an excited quark is excluded for mass between 0.60 and 2.64 TeV, an axigluon hypothesis is excluded for axigluon masses between 0.60 and 2.10 TeV and quantum black holes are excluded in models with six extra space–time dimensions for quantum gravity scales between 0.75 and 3.67 TeV. Production cross section limits as a function of dijet mass are set using a simplified Gaussian signal model to facilitate comparisons with other hypotheses. Analysis of the dijet angular distribution using a novel technique simultaneously employing the dijet mass excludes quark contact interactions with a compositeness scale Λ below 9.5 TeV.
Rights: © 2011 CERN for the benefit of the ATLAS Collaboration, published under licence by IOP Publishing Ltd for the Institute of Physics and Deutsche Physikalische Gesellschaft. Content may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation and DOI.
RMID: 0020133195
DOI: 10.1088/1367-2630/13/5/053044
Appears in Collections:Physics publications

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