Abstract : A search is conducted for hadronic three-body decays of a new massive coloured particle in sqrt(s) = 7 TeV pp collisions at the LHC using an integrated luminosity of 4.6/fb collected by the ATLAS detector. Supersymmetric gluino pair production in the context of a model with R-parity violation is used as a benchmark scenario. The analysis is divided into two search channels, each optimised separately for their sensitivity to high-mass and low-mass gluino production. The first search channel uses a stringent selection on the transverse momentum of the six leading jets and is performed as a counting experiment. The second search channel focuses on low-mass gluinos produced with a large boost. Large-radius jets are selected and the invariant mass of each of the two leading jets is used as a discriminant between the signal and the background. The results are found to be consistent with Standard Modelexpectations and limits are set on the allowed gluino mass.
http://hal.in2p3.fr/in2p3-00743055
Contributeur : Danielle Cristofol
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Soumis le : jeudi 18 octobre 2012 - 08:24:17
Dernière modification le : lundi 9 avril 2018 - 12:22:04
G. Aad, S. Aoun, C. P. Bee, C. Bertella, N. Bousson, et al.. Search for pair production of massive particles decaying into three quarks with the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the LHC. Journal of High Energy Physics, Springer, 2012, 12, pp.086. 〈10.1007/JHEP12(2012)086〉. 〈in2p3-00743055〉
