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|Title:||Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s=13 TeV||Authors:||Tumasyan, A.
Andrejkovic, J. W.
|Keywords:||Beyond Standard Model
|Issue Date:||2023||Publisher:||SPRINGER||Abstract:||A search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The search is based on a data sample of proton-proton collisions at root s = 13TeV recorded with the CMS detector at the LHC in 2016-2018, corresponding to an integrated luminosity of 138 fb(-1). A novel technique, using nearly trackless and out-of-time jet information combined in a deep neural network discriminator, is employed to identify decays of long-lived particles. The results are interpreted in a simplified model of chargino-neutralino production, where the neutralino is the next-to-lightest supersymmetric particle, is long-lived, and decays to a gravitino and either a Higgs or Z boson. This search is most sensitive to neutralino proper decay lengths of approximately 0.5 m, for which masses up to 1.18TeV are excluded at 95% confidence level. The current search is the best result to date in the mass range from the kinematic limit imposed by the Higgs boson mass up to 1.8TeV.||URI:||https://doi.org/10.1007/JHEP07(2023)210
|Appears in Collections:||WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections|
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checked on Dec 4, 2023