Measurement of the Branching Fraction For the Semileptonic Decay D0(+) -> pi(-(0))mu(+)nu(mu )and Test of Lepton Flavor Universality
文献类型：期刊论文
| 作者 | BESIII Collaboration |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2018 |
| 卷号 | 121期号:17页码:171803 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/PhysRevLett.121.171803 |
| 文献子类 | Article |
| 英文摘要 | Using a data sample corresponding to an integrated luminosity of 2.93 fb(-1) taken at a center-of-mass energy of 3.773 GeV with the BESIII detector operated at the BEPCII collider, we perform an analysis of the semileptonic decays D0(+) -> pi(-(0))mu(+)nu(mu ). The branching fractions of D-0 -> pi(-)mu(+)nu(mu), and D+ -> pi(0)mu(+)nu(mu ) are measured to be (0.272 +/- 0.008(start) +/- 0.006(syst))% and (0.350 +/- 0.011(star) +/- 0.010(syst))%, respectively, where the former is of much improved precision compared to previous results and the latter is determined for the first time. Using these results along with previous BESIII measurements of D0(+) -> pi(-(0))e(+)nu(e), we calculate the branching fraction ratios to be R-0 BD0 -> pi(-)mu(+)nu mu BD0 -> pi(-)e(+)nu e=0.922 +/- 0.030(start) +/- 0.022(syst) and R+ BD+ -> pi(0)mu(+)nu mu/BD+ -> pi(0)e(+)nu e= 0.964 +/- 0.037(start) +/- 0.026(syst), which arc compatible with the theoretical expectation of lepton flavor universality within 1.7 sigma and 0.5 sigma, respectively. We also examine the branching fraction ratios in different four-momentum transfer square regions, and find no significant deviations from the standard model predictions. |
| 电子版国际标准刊号 | 1079-7114 |
| WOS关键词 | RADIATIVE-CORRECTIONS ; CROSS-SECTION |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000448463300006 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286814]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | BESIII Collaboration. Measurement of the Branching Fraction For the Semileptonic Decay D0(+) -> pi(-(0))mu(+)nu(mu )and Test of Lepton Flavor Universality[J]. PHYSICAL REVIEW LETTERS,2018,121(17):171803. |
| APA | BESIII Collaboration.(2018).Measurement of the Branching Fraction For the Semileptonic Decay D0(+) -> pi(-(0))mu(+)nu(mu )and Test of Lepton Flavor Universality.PHYSICAL REVIEW LETTERS,121(17),171803. |
| MLA | BESIII Collaboration."Measurement of the Branching Fraction For the Semileptonic Decay D0(+) -> pi(-(0))mu(+)nu(mu )and Test of Lepton Flavor Universality".PHYSICAL REVIEW LETTERS 121.17(2018):171803. |
入库方式： OAI收割
来源：高能物理研究所
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