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

Research output: Contribution to journalArticle

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 B0s→D+s+Xμν̄ and B0s→D0K+Xμν̄ 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(B0s→Ds2*+Xμν̄)/B(B0s→Xμν̄)=(3.3±1.0±0.4)%, and B(B0s→D+s1Xμν̄)/B(B0s→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 B0s decays; we also measure its mass and width. © 2011 CERN.
Original languageEnglish
Pages (from-to)14-20
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
DOIs
Publication statusPublished - 1 Jan 2011
Externally publishedYes

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Agari, M., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amhis, Y., Amoraal, J., Anderson, J., Antunes Nobrega, R., Appleby, R. B., Aquines Gutierrez, O., ... Chiapolini, N. (2011). First observation of B<sup>0</sup><inf>s</inf>→D*<inf>s2</inf>+Xμν̄- decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 14-20. https://doi.org/10.1016/j.physletb.2011.02.039