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

Resultado de la investigación

27 Citas (Scopus)

Resumen

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.
Idioma originalEnglish
Páginas (desde-hasta)14-20
Número de páginas7
PublicaciónPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
DOI
EstadoPublished - 1 ene 2011
Publicado de forma externa

    Huella digital

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Citar esto

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