Search for Quark Compositeness with the Dijet Centrality Ratio in pp Collisions at s√=7 TeV
Baringer, Philip S.
Grachov, Oleg A.
Murray, Michael J.
Sanders, Stephen J.
Wood, Jeffrey Scott
Sirunyan, A. M.
American Physical Society
Scholarly/refereed, publisher version
MetadataShow full item record
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 TeV, is described. The data sample of the study corresponds to an integrated luminosity of 2.9 pb−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.
This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.105.262001.
V. Khachatryan et al. (CMS Collaboration). (2010). "Search for Quark Compositeness with the Dijet Centrality Ratio in pp Collisions at s√=7 TeV." Physical Review Letters, 105(26):262001. http://dx.doi.org/10.1103/PhysRevLett.105.262001.
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