Loading...

Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at s = 13 TeV

Tumasyan, A ; Sharif University of Technology | 2023

0 Viewed
  1. Type of Document: Article
  2. DOI: 10.1007/JHEP07(2023)210
  3. Publisher: Springer Science and Business Media Deutschland GmbH , 2023
  4. Abstract:
  5. 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 s = 13 TeV 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 1.18 TeV 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 1.8 TeV. © The Author(s) 2023
  6. Keywords:
  7. Beyond Standard Model ; Hadron-Hadron Scattering ; Proton-proton collisions at ; Out-of-time trackless jets
  8. Source: Journal of High Energy Physics ; Volume 2023, Issue 7 , 2023 ; 10298479 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/JHEP07(2023)210