Measurement of the fragmentation fraction ratio f<inf>s</inf>/f<inf>d</inf>and its dependence on B meson kinematics

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, Y. Amhis, L. Anderlini, J. Anderson, R. AndreassenR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, S. Bachmann, J. J. Back, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, A. Bates, Th Bauer, A. Bay, J. Beddow, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, M. Benayoun, 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, C. Blanks, J. Blouw, S. Blusk, A. Bobrov, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, 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. Büchler-Germann, I. Burducea, A. Bursche, J. Buytaert, S. Cadeddu, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana

Resultado de la investigaciónrevisión exhaustiva

102 Citas (Scopus)

Resumen

The relative production rate of B 0 sand B 0mesons is determined with the hadronic decays B 0 s→ D sπ +and B 0→ D K +. The measurement uses data corresponding to 1.0 fb −1of pp collisions at a centre-of-mass energy of √s = 7TeV recorded in the forward region with the LHCb experiment. The ratio of production rates, f s/f d, is measured to be 0.238 ± 0.004 ± 0.015 ± 0.021, where the first uncertainty is statistical, the second systematic, and the third theoretical. This is combined with a previous LHCb measurement to obtain f s/f d= 0.256 ±0.020. The dependence of f s/f don the transverse momentum and pseudorapidity of the B meson is determined using the decays B 0 s→ D sπ +and B 0→ D π +. There is evidence for a decrease with increasing transverse momentum, whereas the ratio remains constant as a function of pseudorapidity. In addition, the ratio of branching fractions of the decays B 0→ D K +and B 0→ D π +is measured to be 0.0822 ± 0.0011 (stat) ± 0.0025 (syst).

Idioma originalEnglish
Número de artículo1
Páginas (desde-hasta)1-16
Número de páginas16
PublicaciónJournal of High Energy Physics
Volumen2013
N.º4
DOI
EstadoPublished - 1 ene 2013
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Física nuclear y de alta energía

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