Search for massive long-lived particles decaying semileptonically in the LHCb detector

Abstract : A search is presented for massive long-lived particles decaying into a muon and two quarks. The dataset consists of proton-proton interactions at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 1 and 2 1/fb, respectively. The analysis is performed assuming a set of production mechanisms with simple topologies, including the production of a Higgs-like particle decaying into two long-lived particles. The mass range from 20 to 80 GeV and lifetimes from 5 to 100 ps are explored. Results are also interpreted in terms of neutralino production in different supersymmetric models, with masses in the 23-198 GeV range. No excess above the background expectation is observed and upper limits are set on the production cross-section for various points in the parameter space of theoretical models.
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European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.224. 〈https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-017-4744-6〉. 〈10.1140/epjc/s10052-017-4744-6〉
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http://hal.in2p3.fr/in2p3-01409640
Contributeur : Claudine Bombar <>
Soumis le : mardi 6 décembre 2016 - 09:49:49
Dernière modification le : jeudi 18 janvier 2018 - 02:03:25

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R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Search for massive long-lived particles decaying semileptonically in the LHCb detector. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.224. 〈https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-017-4744-6〉. 〈10.1140/epjc/s10052-017-4744-6〉. 〈in2p3-01409640〉

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