Measurement of the B-0 ->pi(-)l(+)nu form-factor shape and branching fraction, and determination of |V-ub| with a loose neutrino reconstruction technique

	Measurement of the B-0 ->pi(-)l(+)nu form-factor shape and branching fraction, and determination of \|V-ub\| with a loose neutrino reconstruction technique
	BABAR Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2007
卷号	98 期号:9 页码:91801
通讯作者	Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
英文摘要	We report the results of a study of the exclusive charmless semileptonic decay, B-0 ->pi(-)center dot(+)nu, undertaken with approximately 227x10(6) BB pairs collected at the Upsilon(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with an innovative loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q(2), the momentum transfer squared, from which we extract the f(+)(q(2)) form-factor shape and the total branching fraction B(B-0 ->pi(-)l(+)nu)=(1.46 +/- 0.07(stat)+/- 0.08(syst))x10(-4). Based on a recent unquenched lattice QCD calculation of the form factor in the range q(2)> 16 GeV2, we find the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar to be (4.1 +/- 0.2(stat)+/- 0.2(syst)+0.6-0.4(FF))x10(-3), where the last uncertainty is due to the normalization of the form factor.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
WOS记录号	WOS:000244592100009
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/227943]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	BABAR Collaboration. Measurement of the B-0 ->pi(-)l(+)nu form-factor shape and branching fraction, and determination of \|V-ub\| with a loose neutrino reconstruction technique[J]. PHYSICAL REVIEW LETTERS,2007,98(9):91801.
APA	BABAR Collaboration.(2007).Measurement of the B-0 ->pi(-)l(+)nu form-factor shape and branching fraction, and determination of \|V-ub\| with a loose neutrino reconstruction technique.PHYSICAL REVIEW LETTERS,98(9),91801.
MLA	BABAR Collaboration."Measurement of the B-0 ->pi(-)l(+)nu form-factor shape and branching fraction, and determination of \|V-ub\| with a loose neutrino reconstruction technique".PHYSICAL REVIEW LETTERS 98.9(2007):91801.