Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/3086
Title: Search for long-lived particles in final states with displaced dimuon vertices in pp collisions at s =13 TeV with the ATLAS detector
Authors: The ATLAS Collaboration
Sultansoy, Saleh
Keywords: Collisions 
 jets 
proton–proton collisions
Issue Date: 2019
Publisher: American Physical Society
Source: ATLAS Collaboration. (2019). Search for long-lived particles in final states with displaced dimuon vertices in p p collisions at s= 13 TeV with the ATLAS detector. Physical Review D, 99(1), 012001.
Abstract: A search is performed for a long-lived particle decaying into a final state that includes a pair of muons of opposite-sign electric charge, using proton-proton collision data collected at s=13 TeV by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 32.9 fb-1. No significant excess over the Standard Model expectation is observed. Limits at 95% confidence level on the lifetime of the long-lived particle are presented in models of new phenomena including gauge-mediated supersymmetry or decay of the Higgs boson, H, to a pair of dark photons, ZD. Lifetimes in the range c?=1-2400 cm are excluded, depending on the parameters of the model. In the supersymmetric model, the lightest neutralino is the next-to-lightest supersymmetric particle, with a relatively long lifetime due to its weak coupling to the gravitino, the lightest supersymmetric particle. The lifetime limits are determined for very light gravitino mass and various assumptions for the neutralino mass in the range 300-1000 GeV. In the dark photon model, the lifetime limits are interpreted as exclusion contours in the plane of the coupling between the ZD and the Standard Model Z boson versus the ZD mass (in the range 20-60 GeV), for various assumptions for the H?ZDZD branching fraction. © 2019 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
URI: https://hdl.handle.net/20.500.11851/3086
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.012001
ISSN: 24700010
Appears in Collections:Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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