Measurement of the tau lepton polarization and r(d*) in the decay (b)over-bar -> d* tau(-) (v)over-bar(tau)
文献类型：期刊论文
| 作者 | 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
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000402057800003 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.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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