Searches for Λ<sup>0</sup><inf>b</inf> and Ξ<sup>0</sup><inf>b</inf> decays to K<sup>0</sup><inf>s</inf>pπ<sup>-</sup> and K <sup>0</sup><inf>s</inf>pK<sup>-</sup> final states with first observation of the Λ<sup>0</sup><inf>b</inf> → k<sup>0</sup><inf>s</inf>p7π <sup>-</sup> decay

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. Andreassen, M. Andreotti, J. E. AndrewsR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, Th Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, M. Borsato, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, N. H. Brook, H. Brown, A. Bursche, G. Busetto, J. Buytaert, S. Cadeddu, R. Calabrese, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana

Resultado de la investigación

23 Citas (Scopus)

Resumen

A search for previously unobserved decays of beauty baryons to the final states K0spπ- and K0spK- is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb- of pp collisions. The Λ0b → ̄K pπ- decay is observed with a significance of 8.6σ, with branching fraction (Equation Presented), where the uncertainties are statistical, systematic, from the ratio of fragmentation fractions f Λ0b/fd, and from the branching fraction of the B0 → K0π+π - normalisation channel, respectively. A first measurement is made of the CP asymmetry, giving (Equation Presented). No significant signals are seen for Λ0b → K0spK - decays, Ξ0b decays to both the K 0spπ- and K0spK - final states, and the Λ0b → D-s(→ K0sK-)p decay, and upper limits on their branching fractions are reported.
Idioma originalEnglish
PublicaciónJournal of High Energy Physics
DOI
EstadoPublished - 1 ene 2014
Publicado de forma externa

Huella Profundice en los temas de investigación de 'Searches for Λ<sup>0</sup><inf>b</inf> and Ξ<sup>0</sup><inf>b</inf> decays to K<sup>0</sup><inf>s</inf>pπ<sup>-</sup> and K <sup>0</sup><inf>s</inf>pK<sup>-</sup> final states with first observation of the Λ<sup>0</sup><inf>b</inf> → k<sup>0</sup><inf>s</inf>p7π <sup>-</sup> decay'. En conjunto forman una huella única.

  • Citar esto

    Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., Andreotti, M., ... Campana, P. (2014). Searches for Λ<sup>0</sup><inf>b</inf> and Ξ<sup>0</sup><inf>b</inf> decays to K<sup>0</sup><inf>s</inf>pπ<sup>-</sup> and K <sup>0</sup><inf>s</inf>pK<sup>-</sup> final states with first observation of the Λ<sup>0</sup><inf>b</inf> → k<sup>0</sup><inf>s</inf>p7π <sup>-</sup> decay. Journal of High Energy Physics. https://doi.org/10.1007/JHEP04(2014)087