Search for Quark Compositeness with the Dijet Centrality Ratio in pp Collisions at [square root of] s=7 TeV
Name
Khachatryan-2010-Search for Quark Com.pdf
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Author(s)
Alver, Burak Han
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Chan, M.
Dutta, Valentina
Everaerts, Pieter Bruno Bart
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Alternative Title
Search for Quark Compositeness with the Dijet Centrality Ratio in pp Collisions at √s=7 TeV
Date Issued
December 2010
Journal
Physical review letters
Publisher
American Physical Society
Citation
V. Khachatryan et al. "Search for Quark Compositeness with the Dijet Centrality Ratio in pp Collisions at √s=7 TeV" Phys. Rev. Lett. 105, 262001 (2010)© 2010 CERN, for the CMS Collaboration
Version
Author's final manuscript
Abstract
A search for quark compositeness in the form of quark contact interactions, based on hadronic jet pairs (dijets) produced in proton-proton collisions at √s=7 [square root of s=7] TeV, is described. The data sample of the study corresponds to an integrated luminosity of 2.9 pb-1 [pb superscript -1] collected with the CMS detector at the LHC. The dijet centrality ratio, which quantifies the angular distribution of the dijets, is measured as a function of the invariant mass of the dijet system and is found to agree with the predictions of the standard model. A statistical analysis of the data provides a lower limit on the energy scale of quark contact interactions. The sensitivity of the analysis is such that the expected limit is 2.9 TeV; because the observed value of the centrality ratio at high invariant mass is below the expectation, the observed limit is 4.0 TeV at the 95% confidence level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.105.262001
