Search for long-lived particles decaying into displaced jets in proton-proton collisions at √<i>s</i>=13 TeV



Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Dragicevic, M, Eroe, J, Del Valle, A Escalante
et al (show 2246 more authors) (2019) Search for long-lived particles decaying into displaced jets in proton-proton collisions at √<i>s</i>=13 TeV. PHYSICAL REVIEW D, 99 (3). 032011-.

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Abstract

A search for long-lived particles decaying into jets is presented. Data were collected with the CMS detector at the LHC from proton-proton collisions at a center-of-mass energy of 13 TeV in 2016, corresponding to an integrated luminosity of 35.9 fb-1. The search examines the distinctive topology of displaced tracks and secondary vertices. The selected events are found to be consistent with standard model predictions. For a simplified model in which long-lived neutral particles are pair produced and decay to two jets, pair production cross sections larger than 0.2 fb are excluded at 95% confidence level for a long-lived particle mass larger than 1000 GeV and proper decay lengths between 3 and 130 mm. Several supersymmetry models with gauge-mediated supersymmetry breaking or R-parity violation, where pair-produced long-lived gluinos or top squarks decay to several final-state topologies containing displaced jets, are also tested. For these models, in the mass ranges above 200 GeV, gluino masses up to 2300-2400 GeV and top squark masses up to 1350-1600 GeV are excluded for proper decay lengths approximately between 10 and 100 mm. These are the most restrictive limits to date on these models.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 15 Aug 2019 09:44
Last Modified: 17 Mar 2024 03:10
DOI: 10.1103/PhysRevD.99.032011
Open Access URL: http://doi.org/10.1103/PhysRevD.99.032011
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3051816