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First observation of B[bar]s0→Ds2⁎+Xμ−ν[bar] decays

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays B¯s0→Ds+Xμ−ν¯ and B¯s0→D0K+Xμ−ν¯ are detected. Two structures are observed in the D0K+ mass spectrum at masses consistent with the known Ds1(2536)+ and Ds2⁎(2573)+ mes...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Deissenroth, Marc (Author) , Eisele, Franz (Author) , Färber, Christian (Author) , Hansmann-Menzemer, Stephanie (Author) , Holubyev, Kostya (Author) , Krocker, Georg Alexander (Author) , Linn, Christian (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Uwer, Ulrich (Author) , Wandernoth, Sebastian (Author) , Wiedner, Dirk (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 18 February 2011
In: Physics letters
Year: 2011, Volume: 698, Issue: 1, Pages: 14-20
ISSN:1873-2445
DOI:10.1016/j.physletb.2011.02.039
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2011.02.039
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269311001845
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Author Notes:LHCb Collaboration*
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Summary:Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays B¯s0→Ds+Xμ−ν¯ and B¯s0→D0K+Xμ−ν¯ are detected. Two structures are observed in the D0K+ mass spectrum at masses consistent with the known Ds1(2536)+ and Ds2⁎(2573)+ mesons. The measured branching fractions relative to the total B¯s0 semileptonic rate are B(B¯s0→Ds2⁎+Xμ−ν¯)/B(B¯s0→Xμ−ν¯)=(3.3±1.0±0.4)%, and B(B¯s0→Ds1+Xμ−ν¯)/B(B¯s0→Xμ−ν¯)=(5.4±1.2±0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the Ds2⁎+ state in B¯s0 decays; we also measure its mass and width.
Item Description:*LHCb Collaboration: R. Aaij, S. Bachmann, M. Deissenroth, F. Eisele, C. Färber, S. Hansmann-Menzemer, K. Holubyev, G. Krocker, C. Linn, J. Marks, M. Meissner, U. Uwer, S. Wandernoth, D. Wiedner, A. Zhelezov [und 573 weitere Personen]
Im Titel steht die Buchstaben B und v mit einem Oberstrich
Im Titel ist die Zahl 0 sowie die Zeichen * und + hochgestellt
Im Titel ist der Buchstabe s und der Ausdruck "s2" tiefgestellt
Gesehen am 14.02.2022
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2011.02.039

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