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Search for A′→ μ+μ- decays

Searches are performed for both prompt-like and long-lived dark photons,A′,produced in proton-proton collisions at a center-of-mass energy of 13TeV. Thesesearches look forA′→μ+μ−decays using a data sample corresponding to anintegrated luminosity of 5.5fb−1collected with the LHCb d...

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Main Authors: Aaij, Roel (Author) , Archilli, Flavio (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Borsato, Martino (Author) , Braun, Svende (Author) , Comerma-Montells, Albert (Author) , D'Argent, Philippe (Author) , Dziewiecki, Michal (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kecke, Matthieu (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Malygina, Hanna (Author) , Marks, Jörg (Author) , Neubert, Sebastian (Author) , Piucci, Alessio (Author) , Skidmore, Nicola (Author) , Stemmle, Simon (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: December 22, 2019
In: Physical review letters
Year: 2019, Volume: 124, Issue: 4
ISSN:1079-7114
DOI:10.1103/PhysRevLett.124.041801
Online Access:Verlag, lizenzpflichtig, Volltext: https://dx.doi.org/10.1103/PhysRevLett.124.041801
Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/1910.06926
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Author Notes:LHCb collaboration
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Summary:Searches are performed for both prompt-like and long-lived dark photons,A′,produced in proton-proton collisions at a center-of-mass energy of 13TeV. Thesesearches look forA′→μ+μ−decays using a data sample corresponding to anintegrated luminosity of 5.5fb−1collected with the LHCb detector. Neither searchfinds evidence for a signal, and 90% confidence-level exclusion limits are placedon theγ–A′kinetic-mixing strength. The prompt-likeA′search explores themass region from near the dimuon threshold up to 70GeV, and places the moststringent constraints to date on dark photons with 214< m(A′).740MeVand10.6< m(A′).30GeV. The search for long-livedA′→μ+μ−decays placesworld-leading constraints on low-mass dark photons with lifetimesO(1) ps.
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Gesehen am 10.03.2021
R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, S. Braun, A. Comerma-Montells, P. d’Argent, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, J. Hu, M. Kecke, R. Kopecna, B. Leverington, H. Malygina, J. Marks, S. Neubert, A. Piucci, N. Skidmore, S. Stemmle, U. Uwer, A. Zhelezov [und weitere] (LHCb Collaboration)
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.124.041801

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