First observation of B<sup>0</sup><inf>s</inf>→D*<inf>s2</inf>+Xμν̄- decays

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, M. Agari, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, P. Alvarez Cartelle, A. A. Alves, S. Amato, Y. Amhis, J. Amoraal, J. Anderson, R. Antunes Nobrega, R. B. Appleby, O. Aquines Gutierrez, A. ArefyevL. Arrabito, M. Artuso, E. Aslanides, G. Auriemma, S. Bachmann, D. S. Bailey, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, S. Basiladze, A. Bates, C. Bauer, T. Bauer, A. Bay, I. Bediaga, K. Belous, I. Belyaev, M. Benayoun, G. Bencivenni, R. Bernet, M. Bettler, M. van Beuzekom, S. Bifani, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, C. Blanks, J. Blouw, S. Blusk, A. Bobrov, V. Bocci, B. Bochin, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, E. Bos, T. Bowcock, C. Bozzi, T. Brambach, J. van den Brand, J. Bressieux, S. Brisbane, M. Britsch, T. Britton, N. H. Brook, H. Brown, A. Büchler-Germann, A. Bursche, J. Buytaert, S. Cadeddu, J. M. Caicedo Carvajal, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, W. Cameron, L. Camilleri, P. Campana, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, L. Carson, K. Carvalho Akiba, G. Casse, M. Cattaneo, M. Charles, P. Charpentier, J. Cheng, N. Chiapolini

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27 Citations (Scopus)

Abstract

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays B 0 s→D + s+Xμν̄ and B 0 s→D 0K +Xμν̄ are detected. Two structures are observed in the D0K+ mass spectrum at masses consistent with the known D s1(2536) + and D s2*(2573) + mesons. The measured branching fractions relative to the total B-s0 semileptonic rate are B(B 0 s→D s2*+Xμν̄)/B(B 0 s→Xμν̄)=(3.3±1.0±0.4)%, and B(B 0 s→D + s1Xμν̄)/B(B 0 s→Xμν̄)=(5.4±1.2±0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D* + s2 state in B 0 s decays; we also measure its mass and width.

Original languageEnglish
Pages (from-to)14-20
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume698
Issue number1
DOIs
Publication statusPublished - 28 Mar 2011
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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