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

0372557 - FZÚ 2013 RIV NL eng J - Článek v odborném periodiku
Aad, G. - Abbott, B. - Abdallah, J. - Chudoba, Jiří - Gallus, Petr - Gunther, Jaroslav - Hruška, I. - Juránek, Vojtěch - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Kvasnička, Jiří - Lipinský, L. - Lokajíček, Miloš - Marčišovský, Michal - Mikeštíková, Marcela - Myška, Miroslav - Němeček, Stanislav - Panušková, M. - Růžička, Pavel - Schovancová, Jaroslava - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Tic, Tomáš - Valenta, J. - Vrba, Václav … celkem 3034 autorů
Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC.
Physics Letters. B. Roč. 701, č. 1 (2011), s. 1-19. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LA08015; GA MŠMT LA08032
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: squark: long-lived * gluino: long-lived * particle: massive * charged particle * charge: color * ATLAS * CERN LHC Coll * R-hadron
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 3.955, rok: 2011

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 paper a search is performed at the ATLAS 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.
Trvalý link: http://hdl.handle.net/11104/0205849