Search for contact interactions and large extra dimensions in dilepton events from pp collisions at √s=7 TeV with the ATLAS detector
Name
Aad-2013-Search for contact interactions and large extra dimensions in dilepton.pdf
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507.76 KB
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Adobe PDF
Checksum (MD5)
9fa383325a3ab86f19714c278c9d22a5
Author(s)
Taylor, Frank E.
Date Issued
January 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aad, G. et al. “Search for Contact Interactions and Large Extra Dimensions in Dilepton Events from Pp Collisions at Sqrt[s]=7 TeV with the ATLAS Detector.” Physical Review D 87.1 (2013).
Version
Final published version
Abstract
A search for nonresonant new phenomena, originating from either contact interactions or large extra spatial dimensions, has been carried out using events with two isolated electrons or muons. These events, produced at the LHC in proton-proton collisions at √s=7 TeV, were recorded by the ATLAS detector. The data sample, collected throughout 2011, corresponds to an integrated luminosity of 4.9 and 5.0 fb[superscript -1] in the e[superscript +]e[superscript -] and μ[superscript +]μ[superscript -] channels, respectively. No significant deviations from the Standard Model expectation are observed. Using a Bayesian approach, 95% confidence level lower limits ranging from 9.0 to 13.9 TeV are placed on the energy scale of ℓℓqq contact interactions in the left-left isoscalar model. Lower limits ranging from 2.4 to 3.9 TeV are also set on the string scale in large extra dimension models. After combining these limits with results from a similar search in the diphoton channel, slightly more stringent limits are obtained.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 3.0
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.87.015010
