First observation of Bs -> D_{s2}^{*+} X mu nu decays
High Energy Physics - Experiment
2016-08-14 v3
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.
Keywords
Cite
@article{arxiv.1102.0348,
title = {First observation of Bs -> D_{s2}^{*+} X mu nu decays},
author = {LHCb Collaboration and R. Aaij and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and M. Agari and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and P. Alvarez Cartelle and A. A. Alves and S. Amato and Y. Amhis and J. Amoraal and J. Anderson and R. Antunes Nobrega and R. B. Appleby and O. Aquines Gutierrez and A. Arefyev and L. Arrabito and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and D. S. Bailey and V. Balagura and W. Baldini and R. J. Barlow and C. Barschel and S. Barsuk and S. Basiladze and A. Bates and C. Bauer and Th. Bauer and A. Bay and I. Bediaga and K. Belous and I. Belyaev and M. Benayoun and G. Bencivenni and R. Bernet and M. -O. Bettler and M. van Beuzekom and S. Bifani and A. Bizzeti and P. M. Bjørnstad and T. Blake and F. Blanc and C. Blanks and J. Blouw and S. Blusk and A. Bobrov and V. Bocci and B. Bochin and A. Bondar and N. Bondar and W. Bonivento and S. Borghi and A. Borgia and E. Bos and T. J. V. Bowcock and C. 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Soomro and B. Souza De Paula and B. Spaan and A. Sparkes and E. Spiridenkov and P. Spradlin and A. Srednicki and F. Stagni and S. Steiner and O. Steinkamp and O. Stenyakin and S. Stoica and S. Stone and B. Storaci and U. Straumann and N. Styles and M. Szczekowski and P. Szczypka and T Szumlak and S. T'Jampens and V. Talanov and E. Tarkovskiy and E. Teodorescu and H. Terrier and F. Teubert and C. Thomas and E. Thomas and J. van Tilburg and V. Tisserand and M. Tobin and S. Topp-Joergensen and M. T. Tran and S. Traynor and U. Trunk and A. Tsaregorodtsev and N. Tuning and A. Ukleja and P. Urquijo and U. Uwer and V. Vagnoni and G. Valenti and R. Vazquez Gomez and P. Vazquez Regueiro and S. Vecchi and J. J. Velthuis and M. Veltri and K. Vervink and B. Viaud and I. Videau and X. Vilasis-Cardona and J. Visniakov and A. Vollhardt and D. Voong and A. Vorobyev and An. Vorobyev and H. Voss and K. Wacker and S. Wandernoth and J. Wang and D. R. Ward and A. D. Webber and D. Websdale and M. 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journal= {arXiv preprint arXiv:1102.0348},
year = {2016}
}
Comments
8 pages 2 figures. Published in Physics Letters B