| Measurement of the ratio of branching fractions b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu)) | |
| Aaij, R.42; Adeva, B.41; Adinolfi, M.50; Ajaltouni, Z.5; Akar, S.61; Albrecht, J.10; Alessio, F.42; Alexander, M.55; Alfonso Albero, A.40,49; Ali, S.45 | |
| 刊名 | Physical review letters
 |
| 2018-03-23 | |
| 卷号 | 120期号:12页码:10 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/physrevlett.120.121801 |
| 通讯作者 | Aaij, r.() |
| 英文摘要 | A measurement is reported of the ratio of branching fractions r(j/psi) = b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu)), where the tau(+) lepton is identified in the decay mode tthorn tau(+) -> mu(+)nu(mu)(nu) over bar (tau). this analysis uses a sample of proton-proton collision data corresponding to 3.0 fb(-1) of integrated luminosity recorded with the lhcb experiment at center-of-mass energies of 7 and 8 tev. a signal is found for the decay b-c(+) -> j/psi tau(+)nu(tau) at a significance of 3 standard deviations corrected for systematic uncertainty, and the ratio of the branching fractions is measured to be r(j/psi) = 0.71 +/- 0.17(stat) +/- 0.18(syst). this result lies within 2 standard deviations above the range of central values currently predicted by 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:000428167200007 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2178200 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Aaij, R. |
| 作者单位 | 1.CBPF, Rio De Janeiro, Brazil 2.Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil 3.Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China 4.Univ Savoie Mont Blanc, CNRS, IN2P3, LAPP, Annecy Le Vieux, France 5.Clermont Univ, Univ Blaise Pascal, CNRS, IN2P3, Clermont Ferrand, France 6.Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France 7.Univ Paris Saclay, CNRS, IN2P3, Univ Paris Sud,LAL, Orsay, France 8.Univ Paris Diderot, Univ Pierre & Marie Curie, CNRS IN2P3, LPNHE, Paris, France 9.Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany 10.Tech Univ Dortmund, Fak Phys, Dortmund, Germany |
| 推荐引用方式 GB/T 7714 | Aaij, R.,Adeva, B.,Adinolfi, M.,et al. Measurement of the ratio of branching fractions b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu))[J]. Physical review letters,2018,120(12):10. |
| APA | Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2018).Measurement of the ratio of branching fractions b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu)).Physical review letters,120(12),10. |
| MLA | Aaij, R.,et al."Measurement of the ratio of branching fractions b(b-c(+) -> j/psi tau(+)nu(tau))/b(b-c(+) -> j/psi mu(+)nu(mu))".Physical review letters 120.12(2018):10. |
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