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Search for D[ast](2007)0 → μ+ μ− in B− → π− μ+ μ− decays

The very rare D∗(2007)0 → μ+ μ− decay is searched for by analysing B− → π− μ+ μ− decays. The analysis uses a sample of beautymesons produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb−1. The signal signature c...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Borsato, Martino (Author) , Caspary, Rowina (Author) , De Cian, Michel (Author) , Frau, Giulia (Author) , Gerick, David (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Tuci, Giulia (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Witola, Lukas (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 26 July 2023
In: The European physical journal. C, Particles and fields
Year: 2023, Volume: 83, Issue: 7, Pages: 1-14
ISSN:1434-6052
DOI:10.1140/epjc/s10052-023-11759-6
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-023-11759-6
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Author Notes:LHCb collaboration*
Description
Summary:The very rare D∗(2007)0 → μ+ μ− decay is searched for by analysing B− → π− μ+ μ− decays. The analysis uses a sample of beautymesons produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb−1. The signal signature corresponds to simultaneous peaks in the μ+ μ− and π− μ+ μ− invariant masses. No evidence for an excess of events over background is observed and an upper limit is set on the branching fraction of the decay at B(D∗(2007)0 → μ+ μ−) < 2.6 × 10−8 at 90% confidence level. This is the first limit on the branching fraction of D∗(2007)0→ μ+ μ− decays and the most stringent limit on D∗(2007)0 decays to leptonic final states. The analysis is the first search for a rare charm-meson decay exploiting production via beauty decays.
Item Description:Im Titel ist [ast] als Tropfensternchen dargestellt
Im Titel sind das Plus- und Minuszeichen sowie [ast] und die Zahl 0 hochgestellt
*LHCb collaboration: R. Aaij, S. Bachmann, D. Berninghoff, M. Borsato, R. Caspary, M. De Cian, G. Frau, D. Gerick, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecna, B. Leverington, J. Marks, M.P. Morgenthaler, G. Tuci, D.J. Unverzagt, U. Uwer, C. Witola, Y. Zhao, A. Zhelezov (und sehr viele weitere Personen)
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Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-023-11759-6

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