Khachatryan, V. (2010) Search for Quark Compositeness with the Dijet Centrality Ratio in pp Collisions at √s=7 TeV Physical Review Letters, 105 (26). 262001_1-262001_15. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v105/i26/e262001
Related URL: http://dx.doi.org/10.1103/PhysRevLett.105.262001
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=7TeV, 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.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 92201 |
Deposited On: | 29 May 2012 12:15 |
Last Modified: | 15 Oct 2019 10:42 |
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