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Study of B+c → J/ψD+s and B+c → J/ψD*+s decays in pp collisions at √s=13 TeV with the ATLAS detector

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A study of B+c → J/ψD+s B+c → J/ψD*+s decays using 139 fb−1 of integrated luminosity collected with the ATLAS detector from √s = 13 TeV pp collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of the B+c → J/ψπ+→ J/ψπ+ decay are measure...

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Main Authors: Aad, Georges (Author) , Baltes, Lisa Marie (Author) , Bartels, Falk (Author) , Castillo, Florencia Luciana (Author) , Czurylo, Marta (Author) , Dittmeier, Sebastian (Author) , Dunford, Monica (Author) , Franchino, Silvia (Author) , Klassen, Martin (Author) , Mkrtchyan, Tigran (Author) , Ott, Philipp (Author) , Rassloff, Damir Fabrice (Author) , Rodriguez Bosca, Sergi (Author) , Sauer, Christof (Author) , Schöning, André (Author) , Schultz-Coulon, Hans-Christian (Author) , Stamen, Rainer (Author) , Weber, Sebastian (Author) , Wessels, Martin (Author) , Zinßer, Joachim (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: August 5, 2022
In: Journal of high energy physics
Year: 2022, Issue: 8, Pages: 1-41
ISSN:1029-8479
DOI:10.1007/JHEP08(2022)087
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP08(2022)087
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Author Notes:the ATLAS collaboration
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Summary:A study of B+c → J/ψD+s B+c → J/ψD*+s decays using 139 fb−1 of integrated luminosity collected with the ATLAS detector from √s = 13 TeV pp collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of the B+c → J/ψπ+→ J/ψπ+ decay are measured: B(B+c → J/ψD+s) / B(B+c → J/ψπ+) = 2.76 ± 0.47 and B(B+c → J/ψD∗+s )/B(B+c → J/ψπ+) = 5.33 ± 0.96. The ratio of the branching fractions of the two decays is found to be B(B+c → J/ψD∗+s )/B(B+c →J/ψD+s ) = 1.93 ± 0.26. For the B+c → J/ψD∗+s decay, the transverse polarization fraction, Γ±±/Γ, is measured to be 0.70 ± 0.11. The reported uncertainties include both the statistical and systematic components added in quadrature. The precision of the measurements exceeds that in all previous studies of these decays. These results supersede those obtained in the earlier ATLAS study of the same decays with √s = 7 and 8 TeV pp collision data. A comparison with available theoretical predictions for the measured quantities is presented.
Item Description:The ATLAS collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, M.M. Czurylo, S.J. Dittmeier, M. Dunford, S. Franchino, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H-C. Schultz-Coulon, R. Stamen, S.M. Weber, M. Wessels, J. Zinsser [und viele weitere]
Im Text ist "+" und "*" hochgestellt, "s" und "c" tiefgestellt
Im Titel steht "s" unter dem Wurzelzeichen
Gesehen am 27.02.2023
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP08(2022)087

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