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Measurement of the branching fraction ratios R(D+) and R(D[ast]+) using muonic Ο„ decays

The branching fraction ratios of ¯𝐡0→𝐷+β’πœβˆ’β’Β―πœˆπœ and ¯𝐡0→𝐷*+β’πœβˆ’β’Β―πœˆπœ decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fbβˆ’1 collected by the LHCb experiment in proton-proton collisions at βˆšπ‘  =13 TeV. The reconstructed fin...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Carus, Leon (Author) , Caspary, Rowina (Author) , Celani, Sara (Author) , Cocha Toapaxi, Carlos (Author) , De Cian, Michel (Author) , Dittmann, Lucas (Author) , Esen, Sevda (Author) , Frau, Giulia (Author) , Glaser, Fabian (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascón, Paula (Author) , Hu, Jiangqiao (Author) , Kubat, Jakub (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Pais, Preema (Author) , Roy, Shreya (Author) , Ruiz Diaz, Miguel (Author) , Schmelling, Michael (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zavertyaev, Mikhail (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 10 February 2025
In: Physical review letters
Year: 2025, Volume: 134, Issue: 6, Pages: 1-13
ISSN:1079-7114
DOI:10.1103/PhysRevLett.134.061801
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.134.061801
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.134.061801
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Author Notes:R. Aaij et al., (LHCb Collaboration)
Description
Summary:The branching fraction ratios of ¯𝐡0→𝐷+β’πœβˆ’β’Β―πœˆπœ and ¯𝐡0→𝐷*+β’πœβˆ’β’Β―πœˆπœ decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fbβˆ’1 collected by the LHCb experiment in proton-proton collisions at βˆšπ‘  =13 TeV. The reconstructed final states are formed by combining 𝐷+ mesons with πœβˆ’β†’πœ‡βˆ’β’Β―πœˆπœ‡β’πœˆπœ candidates, where the 𝐷+ is reconstructed via the 𝐷+ β†’πΎβˆ’β’πœ‹+β’πœ‹+ decay. The results are 𝑅⁑(𝐷+)=0.249Β±0.043Β±0.047, 𝑅⁑(𝐷*+)=0.402Β±0.081Β±0.085, where the first uncertainties are statistical and the second systematic. The two measurements have a correlation coefficient of βˆ’0.39 and are compatible with the standard model.
Item Description:The LHCb collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, G. Frau, F.C. Glaser, P.A. Günther, X. Han, S. Hausmann-Menzemer, P. Herrero Gascon, J. Hu, J. Kubat, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, P.R. Pais, S.R. Roy, M. Ruiz Diaz, M. Schmelling, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, M. Zavertyaev, Y. Zhao, A. Zhelezov und weitere 1053
Im Titel sind die Zeichen "+" und "[ast]" hochgestellt
Im Titel ist [ast] als Tropfensternchen (englisch: teardrop-spoked asterisk) dargestellt
Gesehen am 20.10.2025
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.134.061801

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