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Measurement of the form factors of the decay B-0 -> D*(-) l(+) v(l) and determination of the CKM matrix element vertical bar V-cb vertical bar
Belle Collaboration
2010
发表期刊PHYSICAL REVIEW D
卷号82期号:11
通讯作者Dungel, W (reprint author), Inst High Energy Phys, Vienna, Austria.
摘要This article describes a determination of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar from the decay B-0 -> D*(-) l(+) v(l) using 711 fb(-1) of Belle data collected near the Y(4S) resonance. We simultaneously measure the product of the form factor normalization F(1) and the matrix element vertical bar V-cb vertical bar as well as the three parameters rho(2), R-1(1) and R-2(1), which determine the form factors of this decay in the framework of the heavy quark effective theory. The results, based on about 120 000 reconstructed B-0 -> D*(-) l(+) v(l) decays, are rho(2) = 1.214 +/- 0.034 +/- 0.009, R-1(1) = 1.401 +/- 0.034 +/- 0.018, R-2(1) = 0.864 +/- 0.024 +/- 0.008 and F(1)vertical bar V-cb vertical bar = (34.6 +/- 0.2 +/- 1.0) x 10(-3). The branching fraction of B-0 -> D*(-) l(+) v(l) is measured at the same time; we obtain a value of B-0 -> D*(-) l(+) v(l) = (4.58 +/- 0.03 +/- 0.26)%. The errors correspond to the statistical and systematic uncertainties. These results give the most precise determination of the form factor parameters and F(1)vertical bar V-cb vertical bar to date. In addition, a direct, model-independent determination of the form factor shapes has been carried out.
关键词SEMILEPTONIC DECAY HEAVY MESONS MONTE-CARLO BELLE IDENTIFICATION SYMMETRY DETECTOR KEKB
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.82.112007
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000286578000001
引用统计
被引频次:45[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/311005/213001
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 form factors of the decay B-0 -> D*(-) l(+) v(l) and determination of the CKM matrix element vertical bar V-cb vertical bar[J]. PHYSICAL REVIEW D,2010,82(11).
APA Belle Collaboration.(2010).Measurement of the form factors of the decay B-0 -> D*(-) l(+) v(l) and determination of the CKM matrix element vertical bar V-cb vertical bar.PHYSICAL REVIEW D,82(11).
MLA Belle Collaboration."Measurement of the form factors of the decay B-0 -> D*(-) l(+) v(l) and determination of the CKM matrix element vertical bar V-cb vertical bar".PHYSICAL REVIEW D 82.11(2010).
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