Journal
PHYSICS LETTERS B
Volume 701, Issue 1, Pages 1-19Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2011.05.010
Keywords
Supersymmetry; Long-lived particle; R-hadron; Limit
Funding
- ANPCyT, Argentina
- YerPhI, Armenia
- ARC, Australia
- BMWF, Austria
- ANAS, Azerbaijan
- SSTC, Belarus
- CNPq
- FAPESP, Brazil
- NSERC
- NRC
- CFI, Canada
- CERN
- CONICYT, Chile
- CAS
- MOST
- NSFC, China
- COLCIENCIAS, Colombia
- MSMT CR
- MPO CR
- VSC CR, Czech Republic
- DNRF
- DNSRC
- Lundbeck Foundation, Denmark
- ARTEMIS
- European Union
- IN2P3-CNRS
- CEA-DSM/IRFU, France
- GNAS, Georgia
- BMBF
- DFG
- HGF
- MPG
- AvH Foundation, Germany
- GSRT, Greece
- ISF
- MINERVA
- GIF
- DIP
- Benoziyo Center, Israel
- INFN, Italy
- MEXT
- JSPS, Japan
- CNRST, Morocco
- FOM
- NWO, Netherlands
- RCN, Norway
- MNiSW, Poland
- GRICES
- FCT, Portugal
- MERYS (MECTS), Romania
- MES of Russia
- ROSATOM, Russian Federation
- JINR
- MSTD, Serbia
- MSSR, Slovakia
- ARRS
- MVZT, Slovenia
- DST/NRF, South Africa
- MICINN, Spain
- SRC
- Wallenberg Foundation, Sweden
- SER
- SNSF
- Cantons of Bern and Geneva, Switzerland
- NSC, Taiwan
- TAEK, Turkey
- STFC
- Royal Society
- Leverhulme Trust, United Kingdom
- DOE
- NSF, United States of America
- ICREA Funding Source: Custom
- Division Of Physics
- Direct For Mathematical & Physical Scien [855405] Funding Source: National Science Foundation
- Science and Technology Facilities Council [PP/E000347/1, ST/H001093/1, ST/H001166/1, ST/I005803/1 GRIDPP, ST/H000887/2, ST/I005803/1, ST/H001026/2, ST/H001026/1, PP/E003699/1, ST/G502320/1, ST/H001093/2, PP/E002838/1, ATLAS, ST/H001069/1, ST/J002798/1, ST/H001077/1, ST/F007337/1, ST/K00073X/1, GRIDPP, PP/E003699/2, ST/I000186/1, ST/I006080/1, PP/E003087/1] Funding Source: researchfish
- STFC [PP/E002838/1, ST/H000887/2, ST/G502320/1, ST/I006080/1, ST/H001093/1, ST/H001166/1, ST/H001026/1, ST/F007337/1, PP/E003699/2, ST/H001069/1, ST/I005803/1, PP/E003087/1, ST/I000186/1, ST/H001077/1, ST/J002798/1, ST/H001093/2, ST/K00073X/1, PP/E003699/1, ST/H001026/2, PP/E000347/1] Funding Source: UKRI
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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. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
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