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A search for new physics in dijet mass and angular distributions in pp collisions at root s=7 TeV measured with the ATLAS detector
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0003-3867-0336
University of Chicago.ORCID-id: 0000-0002-8913-0981
Vise andre og tillknytning
2011 (engelsk)Inngår i: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 13, s. 053044-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A search for new interactions and resonances produced in LHC proton-proton (pp) collisions at a centre-of-mass energy root s = 7 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 similar to 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 3 below 9.5 TeV.

sted, utgiver, år, opplag, sider
2011. Vol. 13, s. 053044-
Emneord [en]
PARTON DISTRIBUTIONS, HADRON COLLIDERS, CHIRAL COLOR, QCD, QUARK
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-36426DOI: 10.1088/1367-2630/13/5/053044ISI: 000292002400004Scopus ID: 2-s2.0-79959226694OAI: oai:DiVA.org:kth-36426DiVA, id: diva2:430777
Merknad
QC 20110711. Tilgjengelig fra: 2011-07-12 Laget: 2011-07-12 Sist oppdatert: 2019-12-04bibliografisk kontrollert

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