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Search for the rare decays B0S → e+ e- and B0 → e+ e-

A search for the decays B0s→e+e− and B0→e+e− is performed using data collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 2 fb−1, respectively. No signal is observed. Assuming no contribut...

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Main Authors: Aaij, Roel (Author) , Archilli, Flavio (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Borsato, Martino (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Malygina, Hanna (Author) , Marks, Jörg (Author) , Uwer, Ulrich (Author) , Witola, Lukas (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 27 May 2020
In: Physical review letters
Year: 2020, Volume: 124, Issue: 21
ISSN:1079-7114
DOI:10.1103/PhysRevLett.124.211802
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.124.211802
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.124.211802
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Author Notes:R. Aaij et al. (LHCb Collaboration)*
Description
Summary:A search for the decays B0s→e+e− and B0→e+e− is performed using data collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 2 fb−1, respectively. No signal is observed. Assuming no contribution from B0→e+e− decays, an upper limit on the branching fraction B(B0s→e+e−)<9.4(11.2)×10−9 is obtained at 90(95)% confidence level. If no B0s→e+e− contribution is assumed, a limit of B(B0→e+e−)<2.5(3.0)×10−9 is determined at 90(95)% confidence level. These upper limits are more than one order of magnitude lower than the previous values.
Item Description:Im Titel ist die Ziffer "0" hochgestellt und der Buchstabe S tiefgestellt
Im Titel sind die Plus- und Minuszeichen hochgestellt
LHCb Collaboration*: Roel Aaij, Flavio Archilli, Sebastian Bachmann, Daniel Berninghoff, Martino Borsato, David Gerick, Jascha Grabowski, Paul André Günther, Xiaoxue Han, Stephanie Hansmann-Menzemer, Jiangqiao Hu, Renata Kopecná, Blake Leverington, Hanna Malygina, Jörg Marks, Ulrich Uwer, Lukas Witola, Alexey Zhelezov [und 890 weitere]
Gesehen am 30.09.2020
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.124.211802

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