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Search for the lepton-flavour violating decays B0(s)→ e± [mu][minus-plus]

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A search for the lepton-flavour violating decays B s 0 → e±μ∓ and B0 → e±μ∓ is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yields are consis...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Braun, Svende (Author) , De Cian, Michel (Author) , Comerma-Montells, Albert (Author) , Dziewiecki, Michal (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Grünberg, Oliver (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Heß, Miriam (Author) , Kecke, Matthieu (Author) , Khanji, Basem (Author) , Kolpin, Michael (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Mitzel, Dominik (Author) , Meinert, Nis (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Piucci, Alessio (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Viemann, Harald (Author) , Waldi, Roland (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: March 13, 2018
In: Journal of high energy physics
Year: 2018, Issue: 3
ISSN:1029-8479
DOI:10.1007/JHEP03(2018)078
Online Access:Verlag, Volltext: https://doi.org/10.1007/JHEP03(2018)078
Verlag, Volltext: https://link.springer.com/content/pdf/10.1007%2FJHEP03%282018%29078.pdf
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Author Notes:the LHCb collaboration
Description
Summary:A search for the lepton-flavour violating decays B s 0 → e±μ∓ and B0 → e±μ∓ is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yields are consistent with the background-only hypothesis. Upper limits on the branching fraction of the B s 0 → e±μ∓ decays are evaluated both in the hypotheses of an amplitude completely dominated by the heavy eigenstate and by the light eigenstate. The results are @B(B0s→e±μ∓)<6.3(5.4)×10−9@@B(Bs0→e±μ∓)<6.3(5.4)×10−9 \frac{@}{@}\mathrm{\mathcal{B}}\left({B}_s^0\to {e}^{\pm }{\mu}^{\mp}\right)<6.3(5.4)\times 1{0}^{-9} and @@B(B0s→e±μ∓)<7.2(6.0)×10−9@@B(Bs0→e±μ∓)<7.2(6.0)×10−9 \frac{@}{@}\mathrm{\mathcal{B}}\left({B}_s^0\to {e}^{\pm }{\mu}^{\mp}\right)<7.2(6.0)\times 1{0}^{-9} at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B0 → e±μ∓ decay is also evaluated, obtaining @@B(B0→e±μ∓)<1.3(1.0)×10−9@@B(B0→e±μ∓)<1.3(1.0)×10−9 \frac{@}{@}\mathrm{\mathcal{B}}\left({B}^0\to {e}^{\pm }{\mu}^{\mp}\right)<1.3(1.0)\times 1{0}^{-9} at 95% (90%) confidence level. These are the strongest limits on these decays to date. Open image in new window
Item Description:Im Titel sind "0" und "(s)" untereinander geschrieben: "0" hochgestellt, "(s)" tiefgestellt
Im Titel wird "mu" als griechischer Buchstabe dargestellt
Im Titel sind "+" und "-" untereinander geschrieben: "+" hochgestellt, "-" tiefgestellt
Im Titel sind nach "mu" die Zeichen "-" und "+" untereinander geschrieben: "-" hochgestellt, "+" tiefgestellt
The LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, D. Berninghoff, S. Braun, A. Comerma-Montells, M. De Cian, M. Dziewiecki, S. Esen, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, R. Kopecna, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, A. Piucci, M. Stahl, S. Stemmle, J. van Tilburg, U. Uwer, A. Zhelezov [und weitere] (
Gesehen am 12.06.2019
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP03(2018)078

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