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Measurement of the branching ratio of (B)over-bar(0) -> D*(+)tau(-)(nu)over-bar(tau) relative to (B)over-bar(0) -> D*(+)l(-)(nu)over-bar(l) decays with a semileptonic tagging method
Belle Collaboration
2016
发表期刊PHYSICAL REVIEW D
卷号94期号:7
文章类型Article
摘要We report a measurement of the ratio R(D*) = B((B) over bar (0) -> D*(+)tau(-)(nu) over bar (tau))/B((B) over bar (0) -> D*(+)l(-)(nu) over bar (l))where l denotes an electron or a muon. The results are based on a data sample containing 772 x 10(6) B (B) over bar pairs recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. We select a sample of B-0(B) over bar (0) pairs by reconstructing both B mesons in semileptonic decays to D*(-/+)l(+/-). We measure R(D*) = 0.302 +/- 0.030(stat) +/- 0.011(syst), which is within 1.6 sigma of the Standard Model theoretical expectation, where the standard deviation sigma includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.
DOI10.1103/PhysRevD.94.072007
关键词[WOS]B-DECAYS ; BELLE ; IDENTIFICATION ; PACKAGE ; KEKB
语种英语
WOS记录号WOS:000387256100001
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260962
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 ratio of (B)over-bar(0) -> D*(+)tau(-)(nu)over-bar(tau) relative to (B)over-bar(0) -> D*(+)l(-)(nu)over-bar(l) decays with a semileptonic tagging method[J]. PHYSICAL REVIEW D,2016,94(7).
APA Belle Collaboration.(2016).Measurement of the branching ratio of (B)over-bar(0) -> D*(+)tau(-)(nu)over-bar(tau) relative to (B)over-bar(0) -> D*(+)l(-)(nu)over-bar(l) decays with a semileptonic tagging method.PHYSICAL REVIEW D,94(7).
MLA Belle Collaboration."Measurement of the branching ratio of (B)over-bar(0) -> D*(+)tau(-)(nu)over-bar(tau) relative to (B)over-bar(0) -> D*(+)l(-)(nu)over-bar(l) decays with a semileptonic tagging method".PHYSICAL REVIEW D 94.7(2016).
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