Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC

, The ATLAS collaboration (2011) Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC. Physics Letters B, 701 (1). pp. 1-19. ISSN 0370-2693

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Abstract

Hitherto unobserved long-lived massive particles with electric and/or colour charge are predicted by a range of theories which extend the Standard Model. In this Letter a search is performed at the ATLAS experiment for slow-moving charged particles produced in proton-proton collisions at 7 TeV centre-of-mass energy at the LHC, using a data-set corresponding to an integrated luminosity of 34 pb(-1). No deviations from Standard Model expectations are found. This result is interpreted in a framework of supersymmetry models in which coloured sparticles can hadronise into long-lived bound hadronic states, termed R-hadrons, and 95% CL limits are set on the production cross-sections of squarks and gluinos. The influence of R-hadron interactions in matter was studied using a number of different models, and lower mass limits for stable sbottoms and stops are found to be 294 and 309 GeV respectively. The lower mass limit for a stable gluino lies in the range from 562 to 586 GeV depending on the model assumed. Each of these constraints is the most stringent to date.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Additional Information:
This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
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ID Code:
68083
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Deposited On:
16 Dec 2013 16:57
Refereed?:
Yes
Published?:
Published
Last Modified:
02 Dec 2020 01:55