Measurement of cp violation in b-0 -> j/psi k-s(0) and b-0 -> psi(2s) k-s(0) decays
文献类型：期刊论文
| 作者 | Aaij, R.42; Adeva, B.41; Adinolfi, M.50; Ajaltouni, Z.5; Akar, S.61; Albrecht, J.10; Alessio, F.42; Alexander, M.55; Albero, A. Alfonso40; Ali, S.45 |
| 刊名 | Journal of high energy physics
 |
| 出版日期 | 2017-11-27 |
| 期号 | 11页码:18 |
| ISSN号 | 1029-8479 |
| 关键词 | B physics Ckm angle beta Cp violation Flavor physics Hadron-hadron scattering (experiments) |
| DOI | 10.1007/jhep11(2017)170 |
| 通讯作者 | Mueller, v.(vanessa.mueller@cern.ch) |
| 英文摘要 | A measurement is presented of decay-time-dependent cp violation in the decays b-0 -> j/psi k-s(0) and b-0 -> psi(2s) k-s(0), where the j/psi is reconstructed from two electrons and the psi(2s) from two muons. the analysis uses a sample of pp collision data recorded with the lhcb experiment at centre-of-mass energies of 7 and 8 tev, corresponding to an integrated luminosity of 3 fb(-1). the cp-violation observables are measured to be c(b-0 -> j/psi k-s(0)) = 0.12 +/- 0.07 +/- 0.02, s(b-0 -> j/psi k-s(0)) = 0.83 +/- 0.08 +/- 0.01, c(b-0 -> psi(2s) k-s(0)) = -0.05 +/- 0.10 +/- 0.01, s(b-0 -> psi(2s) k-s(0)) = 0.84 +/- 0.10 +/- 0.01, where c describes cp violation in the direct decay, and s describes cp violation in the interference between the amplitudes for the direct decay and for the decay after b-0-(b) over bar (0) oscillation. the first uncertainties are statistical and the second are systematic. the two sets of results are compatible with the previous lhcb measurement using b-0 -> j/psi k-s(0) decays, where the j/psi meson was reconstructed from two muons. the averages of all three sets of lhcb results are c(b-0 -> [c (c) over bar] k-s(0)) = -0.017 +/- 0.029, s(b-0 -> [c (c) over bar] k-s(0)) = 0.760 +/- 0.034, under the assumption that higher-order contributions to the decay amplitudes are negligible. the uncertainties include statistical and systematic contributions. |
| WOS关键词 | DISTRIBUTIONS ; ERRORS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000417087900001 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178287 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Mueller, V. |
| 作者单位 | 1.CBPF, Rio De Janeiro, Brazil 2.Univ Fed Rio de Janeiro, 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.Univ Blaise Pascal, Clermont Univ, CNRS, IN2P3,LPC, Clermont Ferrand, France 6.Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France 7.Univ Paris 11, CNRS, IN2P3, 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 cp violation in b-0 -> j/psi k-s(0) and b-0 -> psi(2s) k-s(0) decays[J]. Journal of high energy physics,2017(11):18. |
| APA | Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2017).Measurement of cp violation in b-0 -> j/psi k-s(0) and b-0 -> psi(2s) k-s(0) decays.Journal of high energy physics(11),18. |
| MLA | Aaij, R.,et al."Measurement of cp violation in b-0 -> j/psi k-s(0) and b-0 -> psi(2s) k-s(0) decays".Journal of high energy physics .11(2017):18. |
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