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Journal articles
First observation of Bs -> D_{s2}^{*+} X mu nu decays
R. Aaij
C. Adrover
1
F. Alesio
1
E. Aslanides
1
J. Cogan
1
B. Khanji
1
R. Le Gac
1
O. Leroy
1
G. Mancinelli
1
E. Maurice
1
M. Sapunov
1
J. Serrano
1
A. Tsaregorodtsev
1
L. Arrabito
2
I. de Bonis
3
D. Decamp
3
Ph. Ghez
3
P. Hopchev
3
J.-P. Lees
3
I.V. Machikhiliyan
3
M.-N. Minard
3
B. Pietrzyk
3
S. t'Jampens
3
V. Tisserand
3
G. Mancinelli 1
Author
E. Maurice 1
Author
M. Sapunov 1
Author
J. Serrano 1
Author IdHAL : justine-serrano
1
CPPM - Centre de Physique des Particules de Marseille (163, avenue de Luminy - Case 902 - 13288 Marseille cedex 09 - France)
- AMU - Aix Marseille Université : UMR7346 (Aix-Marseille Université Jardins du Pharo 58 Boulevard Charles Livon 13284 Marseille cedex 7 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR7346 (France)
2
CC-IN2P3 - Centre de Calcul de l'IN2P3 (Domaine scientifique de La Doua
43 bd du 11 Novembre 1918
69622 Villeurbanne Cedex - France)
3
LAPP - Laboratoire d'Annecy de Physique des Particules (9 Chemin de Bellevue - BP 110 - 74941 Annecy-le-Vieux CEDEX - France - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc (27, rue Marcoz - 73000 Chambéry - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5814 (France)
Abstract : Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays Bs -> Ds+ X mu nu and Bs -> D0 K+ X mu nu are detected. Two structures are observed in the D0 K+ mass spectrum at masses consistent with the known D^+_{s1}(2536) and $D^{*+}_{s2}(2573) mesons. The measured branching fractions relative to the total Bs semileptonic rate are B(Bs -> D_{s2}^{*+} X mu nu)/B(Bs -> X mu nu)= (3.3\pm 1.0\pm 0.4)%, and B(Bs -> D_{s1}^+ X munu)/B(Bs -> X mu nu)= (5.4\pm 1.2\pm 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D_{s2}^{*+} state in Bs decays; we also measure its mass and width.
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Journal articles
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http://hal.in2p3.fr/in2p3-00563271
Contributor : Danielle Cristofol <>
Submitted on : Friday, February 4, 2011 - 3:25:05 PM
Last modification on : Wednesday, July 22, 2020 - 9:54:18 AM
Contributor : Danielle Cristofol <>
Submitted on : Friday, February 4, 2011 - 3:25:05 PM
Last modification on : Wednesday, July 22, 2020 - 9:54:18 AM
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- HAL Id : in2p3-00563271, version 1
- DOI : 10.1016/j.physletb.2011.02.039
- ARXIV : 1102.0348
Citation
R. Aaij, C. Adrover, F. Alesio, E. Aslanides, J. Cogan, et al.. First observation of Bs -> D_{s2}^{*+} X mu nu decays. Physics Letters B, Elsevier, 2011, 698, pp.14-20. ⟨10.1016/j.physletb.2011.02.039⟩. ⟨in2p3-00563271⟩
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