Measurements Of The Branching Fractions Of The Decays B-S(0) -> (Dsk +/-)-K--/+ And B-S(0) -> D-S(-)Pi(+)
R. Aaij,C. Abellan Beteta,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,J. Anderson,R. B. Appleby,O. Aquines Gutierrez, F. Archilli,A. Artamonov,M. Artuso, E. Aslanides, G. Auriemma,S. Bachmann,J. J. Back,V. Balagura,W. Baldini,R. J. Barlow,C. Barschel, S. Barsuk,W. Barter,A. Bates,C. Bauer,Th Bauer, A. Bay, I. Bediaga,S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim,M. Benayoun, G. Bencivenni,S. Benson,J. Benton, R. Bernet,M. -O. Bettler,M. Van Beuzekom, A. Bien, S. Bifani,T. Bird,A. Bizzeti, P. M. Bjornstad,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, C. Bozzi,T. Brambach,J. Van Den Brand, J. Bressieux,D. Brett, M. Britsch,T. Britton,N. H. Brook,H. Brown, A. Buechler-Germann, I. Burducea, A. Bursche,J. Buytaert,S. Cadeddu, O. Callot,M. Calvi,M. Calvo Gomez,A. 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Voss, R. Waldi, S. Wandernoth,J. Wang, D. R. Ward, N. K. Watson, A. D. Webber,D. Websdale,M. Whitehead, D. Wiedner,L. Wiggers,G. Wilkinson,M. P. Williams,M. Williams, F. F. Wilson, J. Wishahi,M. Witek, W. Witzeling, S. A. Wotton, K. Wyllie, Y. Xie, F. Xing,Z. Xing,Z. Yang,R. Young, O. Yushchenko,M. Zangoli, M. Zavertyaev,F. Zhang, L. Zhang,W. C. Zhang,Y. Zhang, A. Zhelezov,L. Zhong,A. Zvyagin
Journal of High Energy Physics（2012）
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摘要
The decay mode B-s(0) -> (DsK +/-)-K--/+ allows for one of the theoretically cleanest measurements of the CKM angle gamma through the study of time-dependent CP violation. This paper reports a measurement of its branching fraction relative to the Cabibbo-favoured mode B-s(0) -> D-s(-)pi(+) based on a data sample corresponding to 0.37 fb(-1) of proton-proton collisions at root s = 7TeV collected in 2011 with the LHCb detector. In addition, the ratio of B meson production fractions f(s)/f(d), determined from semileptonic decays, together with the known branching fraction of the control channel B-0 -> D-pi(+), is used to perform an absolute measurement of the branching fractions:B (B-s(0) -> D-s(-)pi(+)) = (2.95 +/- 0.05 +/- 0.17(-0.22)(+0.18)) x 10(-3),B(B-s(0) -> (DK +/-)-K--/+) = (1.90 +/- 0.12 +/- 0.13(-0.14)(+0.12)) x 10(-4),where the first uncertainty is statistical, the second the experimental systematic uncertainty, and the third the uncertainty due to f(s)/f(d).
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