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Search for Stopped Gluinos in pp Collisions at root s=7 TeV

Author(s)
Alver, Burak Han; Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Dutta, Valentina; Everaerts, Pieter Bruno Bart; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Harris, Philip Coleman; Klute, Markus; Lee, Yen-Jie; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Rudolph, Matthew Scott; Stephans, George S. F.; Sung, Kevin Kai Hong; Wenger, Edward Allen; Xie, Si; Yang, Mingming; Yilmaz, Yetkin; Zanetti, Marco; Bauer, Gerry P; Kim, Y.; Li, W.; Loizides, Constantinos; Luckey Jr, P David; Roland, Christof E; Roland, Gunther M; Sumorok, Konstanty C; Yoon, A. S.; ... Show more Show less
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Abstract
The results of the first search for long-lived gluinos produced in 7 TeV pp collisions at the CERN Large Hadron Collider are presented. The search looks for evidence of long-lived particles that stop in the CMS detector and decay in the quiescent periods between beam crossings. In a dataset with a peak instantaneous luminosity of 1×1032 [1 x 10 superscript 32]  cm-2 s-1 [cm superscript -2 s superscript -1] , an integrated luminosity of 10  pb-1 [pb superscript -1], and a search interval corresponding to 62 hours of LHC operation, no significant excess above background was observed. Limits at the 95% confidence level on gluino pair production over 13 orders of magnitude of gluino lifetime are set. For a mass difference mg˜-mχ˜10>100  GeV/c2 [m subscript _ g minus m subscript -0 over X subscript 1, greater than 100 GeV over c superscript 2], and assuming BR(g˜→gχ˜10)=100% [BR (g → g X -0 subscript 1 = 100%], mg˜<370  GeV/c2 [m subscript g less than 370 GeV over c superscript 2]are excluded for lifetimes from 10  μs [mu s] to 1000 s
Date issued
2011-01
URI
http://hdl.handle.net/1721.1/64413
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical review letters
Publisher
American Physical Society
Citation
Khachatryan, V. et al. "Search for Stopped Gluinos in pp Collisions at √s=7 [square root s=7] TeV" Physical review letters, v. 106, no. 1, Jan. 2011. © 2011 CERN, for the CMS Collaboration
Version: Final published version
ISSN
0031-9007

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