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	Measurement of the tau lepton polarization and r(d*) in the decay (b)over-bar -> d* tau(-) (v)over-bar(tau)
	Hirose, S.47; Iijima, T.47,48; Adachi, I.11,14; Adamczyk, K.53; Aihara, H.74; Al Said, S.31,67; Asner, D. M.57; Atmacan, H.43; Aulchenko, V.4,56; Aushev, T.46
刊名	Physical review letters
	2017-05-26
卷号	118期号:21页码:7
ISSN号	0031-9007
DOI	10.1103/physrevlett.118.211801
通讯作者	Hirose, s.()
英文摘要	We report the first measurement of the tau lepton polarization p-tau(d*) in the decay (b) over bar -> d* tau(-) (v) over bar (tau) as well as a newmeasurement of the ratio of the branching fractions r(d*) = b((b) over bar -> d* tau(-) (v) over bar (tau)) / b((b) over bar -> d* l(-) (v) over bar (l)), where l(-) denotes an electron or a muon, and the tau is reconstructed in the modes tau(-) -> pi(-) v(tau) and tau(-) -> rho(-) v(tau). we use the full data sample of 772 x 10(6) b (b) over bar pairs recorded with the belle detector at the (kekb) over bar electron-positron collider. our results, p-tau(d*) = -0.38 +/- 0.51 (stat)(-0.16)(+0.21) (syst) and r(d*) = 0.270 +/- 0.035 (stat)(- 0.025)(+0.028) (syst), are consistent with the theoretical predictions of the standard model.
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000402057800003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2177387
专题	高能物理研究所
通讯作者	Hirose, S.
作者单位	1.Univ Basque Country, UPV EHU, E-48080 Bilbao, Spain 2.Beihang Univ, Beijing 100191, Peoples R China 3.Univ Bonn, D-53115 Bonn, Germany 4.Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia 5.Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic 6.Chonnam Natl Univ, Kwangju 660701, South Korea 7.Univ Cincinnati, Cincinnati, OH 45221 USA 8.Deutsches Elektronen Synchrotron, D-22607 Hamburg, Germany 9.Univ Florida, Gainesville, FL 32611 USA 10.Justus Liebig Univ Giessen, D-35392 Giessen, Germany
推荐引用方式 GB/T 7714	Hirose, S.,Iijima, T.,Adachi, I.,et al. Measurement of the tau lepton polarization and r(d*) in the decay (b)over-bar -> d* tau(-) (v)over-bar(tau)[J]. Physical review letters,2017,118(21):7.
APA	Hirose, S..,Iijima, T..,Adachi, I..,Adamczyk, K..,Aihara, H..,...&Zupanc, A..(2017).Measurement of the tau lepton polarization and r(d*) in the decay (b)over-bar -> d* tau(-) (v)over-bar(tau).Physical review letters,118(21),7.
MLA	Hirose, S.,et al."Measurement of the tau lepton polarization and r(d*) in the decay (b)over-bar -> d* tau(-) (v)over-bar(tau)".Physical review letters 118.21(2017):7.

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