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Search for Magnetic Monopoles in √s=7  TeV pp Collisions with the ATLAS Detector

Author(s)
Taylor, Frank E.
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Abstract
This Letter presents a search for magnetic monopoles with the ATLAS detector at the CERN Large Hadron Collider using an integrated luminosity of 2.0  fb[superscript -1] of pp collisions recorded at a center-of-mass energy of √s=7   TeV. No event is found in the signal region, leading to an upper limit on the production cross section at 95% confidence level of 1.6/ϵ  fb for Dirac magnetic monopoles with the minimum unit magnetic charge and with mass between 200 GeV and 1500 GeV, where ϵ is the monopole reconstruction efficiency. The efficiency ϵ is high and uniform in the fiducial region given by pseudorapidity |η|<1.37 and transverse kinetic energy 600–700<E[superscript kin] sin θ<1400   GeV. The minimum value of 700 GeV is for monopoles of mass 200 GeV, whereas the minimum value of 600 GeV is applicable for higher mass monopoles. Therefore, the upper limit on the production cross section at 95% confidence level is 2 fb in this fiducial region. Assuming the kinematic distributions from Drell-Yan pair production of spin-1/2 Dirac magnetic monopoles, the efficiency is in the range 1%–10%, leading to an upper limit on the cross section at 95% confidence level that varies from 145 fb to 16 fb for monopoles with mass between 200 GeV and 1200 GeV. This limit is weaker than the fiducial limit because most of these monopoles lie outside the fiducial region.
Date issued
2012-12
URI
http://hdl.handle.net/1721.1/77183
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aad, G. et al. “Search for Magnetic Monopoles in √s=7  TeV pp Collisions with the ATLAS Detector.” Physical Review Letters 109.26 (2012).
Version: Final published version
ISSN
0031-9007
1079-7114

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