Search for Quark Compositeness with the Dijet Centrality Ratio in $pp$ Collisions at $s=7$ TeV
Search for Quark Compositeness with the Dijet Centrality Ratio in $pp$ Collisions at $s=7$ TeV
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.
262001
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
2010
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
(2010)
Search for Quark Compositeness with the Dijet Centrality Ratio in $pp$ Collisions at $s=7$ TeV.
Physical Review Letters, 105, .
(doi: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=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.
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Published date: 2010
Organisations:
Physics & Astronomy
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Local EPrints ID: 411574
URI: http://eprints.soton.ac.uk/id/eprint/411574
PURE UUID: 3f79a836-28bd-4f5e-801a-bc94061e0504
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Date deposited: 20 Jun 2017 16:33
Last modified: 10 Nov 2021 03:19
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Author:
Vardan Khachatryan
Corporate Author: The CMS Collaboration
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