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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| Hauptverfasser: | , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
18 February 2011
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| In: |
Physics letters
Year: 2011, Jahrgang: 698, Heft: 1, Pages: 14-20 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2011.02.039 |
| Online-Zugang: | 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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| Verfasserangaben: | LHCb Collaboration* |
MARC
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| 245 | 1 | 0 | |a First observation of B[bar]s0→Ds2⁎+Xμ−ν[bar] decays |c LHCb Collaboration* |
| 246 | 3 | 3 | |a First observation of B[bar] s 0 → D s 2 ⁎ + X mu − nu[bar] decays |
| 264 | 1 | |c 18 February 2011 | |
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| 500 | |a *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] | ||
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| 500 | |a Im Titel ist der Buchstabe s und der Ausdruck "s2" tiefgestellt | ||
| 500 | |a Gesehen am 14.02.2022 | ||
| 520 | |a 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. | ||
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