Search for disappearing tracks as a signature of new long-lived particles in proton-proton collisions at root s=13 TeV

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Pysyväisosoite

http://hdl.handle.net/10138/246355

Lähdeviite

The CMS Collaboration , Sirunyan , A M , Eerola , P , Kirschenmann , H , Pekkanen , J , Voutilainen , M , Havukainen , J , Heikkilä , J K , Järvinen , T , Karimäki , V , Kinnunen , R , Lampén , T , Lassila-Perini , K , Laurila , S , Lehti , S , Lindén , T , Luukka , P , Mäenpää , T , Siikonen , H , Tuominen , E , Tuominiemi , J & Tuuva , T 2018 , ' Search for disappearing tracks as a signature of new long-lived particles in proton-proton collisions at root s=13 TeV ' , Journal of High Energy Physics , vol. 2018 , no. 8 , 016 . https://doi.org/10.1007/JHEP08(2018)016

Julkaisun nimi: Search for disappearing tracks as a signature of new long-lived particles in proton-proton collisions at root s=13 TeV
Tekijä: The CMS collaboration; Sirunyan, A. M.; Eerola, P.; Kirschenmann, H.; Pekkanen, J.; Voutilainen, M.; Havukainen, J.; Heikkilä, J. K.; Järvinen, T.; Karimäki, V.; Kinnunen, R.; Lampén, T.; Lassila-Perini, K.; Laurila, S.; Lehti, S.; Lindén, T.; Luukka, P.; Mäenpää, T.; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Tuuva, T.
Tekijän organisaatio: Department of Physics
Helsinki Institute of Physics
Päiväys: 2018-08-07
Kieli: eng
Sivumäärä: 40
Kuuluu julkaisusarjaan: Journal of High Energy Physics
ISSN: 1029-8479
DOI-tunniste: https://doi.org/10.1007/JHEP08(2018)016
URI: http://hdl.handle.net/10138/246355
Tiivistelmä: A search is presented for long-lived charged particles that decay within the CMS detector and produce the signature of a disappearing track. A disappearing track is an isolated track with missing hits in the outer layers of the silicon tracker, little or no energy in associated calorimeter deposits, and no associated hits in the muon detectors. This search uses data collected with the CMS detector in 2015 and 2016 from proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, corresponding to an integrated luminosity of 38.4 fb(-1). The results of the search are interpreted in the context of the anomaly-mediated supersymmetry breaking model. The data are consistent with the background-only hypothesis. Limits are set on the product of the cross section for direct production of charginos and their branching fraction to a neutralino and a pion, as a function of the chargino mass and lifetime. At 95% confidence level, charginos with masses below 715 (695) GeV are excluded for a lifetime of 3 (7) ns, as are charginos with lifetimes from 0.5 to 60 ns for a mass of 505 GeV. These are the most stringent limits using a disappearing track signature on this signal model for chargino lifetimes above approximate to 0.7 ns.
Avainsanat: 114 Physical sciences
Vertaisarvioitu: Kyllä
Tekijänoikeustiedot: cc_by
Pääsyrajoitteet: openAccess
Rinnakkaistallennettu versio: publishedVersion


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