Search for stopped long-lived particles produced in pp collisions at √ s = 7TeV
Name
Chatrchyan2012_Article_SearchForStoppedLong-livedPart.pdf
Description
Published version
Size
707.35 KB
Format
Adobe PDF
Checksum (MD5)
4167ca8fcdf22e8d625d4132dfb7b432
Author(s)
The CMS Collaboration
Date Issued
2012
Journal
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Citation
Chatrchyan, S., et al. "Search for Stopped Long-Lived Particles Produced in Pp Collisions at vS = 7 Tev." Journal of High Energy Physics 2012 8 (2012).
Version
Final published version
Abstract
A search has been performed for long-lived particles that have stopped in the CMS detector, during 7TeV proton-proton operations of the CERN LHC. The existence of such particles could be inferred from observation of their decays when there were no protonproton collisions in the CMS detector, namely during gaps between LHC beam crossings. Using a data set in which CMS recorded an integrated luminosity of 4.0 fb-1, and a search interval corresponding to 246 hours of trigger live time, 12 events are observed, with a mean background prediction of 8:6 ± 2:4 events. Limits are presented at 95% confidence level on long-lived gluino and stop production, over 13 orders of magnitude of particle lifetime. Assuming the "cloud model" of R-hadron interactions, a gluino with mass below 640 GeV and a stop with mass below 340 GeV are excluded, for lifetimes between 10 μs and 1000 s.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP08(2012)026
