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Measurement of the branching fractions for B-0 -> Ds(*+)pi(-) and B-0 -> Ds*-K+ decays
Belle Collaboration
2010
发表期刊PHYSICAL REVIEW D
卷号81期号:3
通讯作者Joshi, NJ (reprint author), Tata Inst Fundamental Res, Homi Bhabha Rd, Mumbai 400005, Maharashtra, India.
摘要We present a study of B-0 -> D-s*(+)pi(-) and B-0 -> D-s*K--(+) decays based on a sample of 657 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the branching fractions to be B(B-0 -> D-s*(+)pi(-)) = (1.75 +/- 0.34(stat) +/- 0.17(syst) +/- 0.11(B)) x 10(-5) and B(B-0 -> D-s*K--(+)) = (2.02 +/- 0.33(stat) +/- 0.18(syst) +/- 0.13(B)) x 10(-5), with significances of 6.1 and 8.0 standard deviations, respectively. The first uncertainty is statistical, the second is due to the experimental systematics, and the third is from uncertainties in the D-s(+) decay branching fractions. From our measurements, we obtain the most precise determination so far of R-D*pi, where R-D*pi is the ratio between amplitudes of the doubly Cabibbo-suppressed decay B-0 -> D*(+)pi(-) and the Cabibbo-favored B-0 -> D*(-)pi(+) decay.
关键词BELLE DETECTOR CP-VIOLATION ANNIHILATION SYMMETRY
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.81.031101
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000275069000001
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/212930
专题实验物理中心
作者单位中国科学院高能物理研究所
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Belle Collaboration. Measurement of the branching fractions for B-0 -> Ds(*+)pi(-) and B-0 -> Ds*-K+ decays[J]. PHYSICAL REVIEW D,2010,81(3).
APA Belle Collaboration.(2010).Measurement of the branching fractions for B-0 -> Ds(*+)pi(-) and B-0 -> Ds*-K+ decays.PHYSICAL REVIEW D,81(3).
MLA Belle Collaboration."Measurement of the branching fractions for B-0 -> Ds(*+)pi(-) and B-0 -> Ds*-K+ decays".PHYSICAL REVIEW D 81.3(2010).
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