A search is performed for massive long-lived particles (LLPs) decaying semileptonically into a muon and two quarks. Two kinds of LLP production processes were considered. In the first, a Higgs-like boson with mass from 30 to 200 GeV/c^2 is produced by gluon fusion and decays into two LLPs. The analysis covers LLP mass values from 10 GeV/c^2 up to about one half the Higgs-like boson mass. The second LLP production mode is directly from quark interactions, with LLP masses from 10 to 90 GeV/c^2. The LLP lifetimes considered range from 5 to 200 ps. This study uses LHCb data collected from proton-proton collisions at √s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb^−1. No evidence of these long-lived states has been observed, and upper limits on the production cross-section times branching ratio have been set for each model considered.
Search for Massive Long-Lived Particles Decaying Semileptonically at √s = 13 TeV
Calabrese, R.;Capriotti, L.;Couturier, B.;Fiorini, M.;Franzoso, E.;Giugliano, C.;Guarise, M.;Kotriakhova, S.;Luppi, E.;Neri, I.;Okamura, S.;Pappalardo, L. L.;Passalacqua, B.;Tomassetti, L.;
2022
Abstract
A search is performed for massive long-lived particles (LLPs) decaying semileptonically into a muon and two quarks. Two kinds of LLP production processes were considered. In the first, a Higgs-like boson with mass from 30 to 200 GeV/c^2 is produced by gluon fusion and decays into two LLPs. The analysis covers LLP mass values from 10 GeV/c^2 up to about one half the Higgs-like boson mass. The second LLP production mode is directly from quark interactions, with LLP masses from 10 to 90 GeV/c^2. The LLP lifetimes considered range from 5 to 200 ps. This study uses LHCb data collected from proton-proton collisions at √s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb^−1. No evidence of these long-lived states has been observed, and upper limits on the production cross-section times branching ratio have been set for each model considered.File | Dimensione | Formato | |
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2022-AR-22-Sea_for_Massive_Long_Lived_Part_Dec_Semileptonically-EPJC.pdf
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