Study of charmonium production in b-hadron decays and first evidence for the decay b-s(0) -> phi phi phi
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; Ali, S.45; Alkhazov, G.33 |
| 刊名 | European physical journal c
 |
| 出版日期 | 2017-09-14 |
| 卷号 | 77期号:9页码:18 |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-017-5151-8 |
| 通讯作者 | Aaij, r.(sergey.barsuk@cern.ch) |
| 英文摘要 | Using decays to f-meson pairs, the inclusive production of charmonium states in b-hadron decays is studied with pp collision data corresponding to an integrated luminosity of 3.0 fb(-1), collected by the lhcb experiment at centre-of-mass energies of 7 and 8 tev. denoting by b-c = b(b -> cx) x b(c -> phi phi) the inclusive branching fraction of a b hadron to a charmonium state c that decays into a pair of phi mesons, ratios r-c2(c1) = b-c1/b-c2 are determined as r-eta c(1s)(chi c0) = 0.147 +/- 0.023 +/- 0.011, r-eta c(1s)(chi c1) = 0.073 +/- 0.016 +/- 0.006, r-eta c(1s)(chi c2) = 0.081 +/- 0.013 +/- 0.005, r-chi c0(chi c1) = 0.50 +/- 0.11 +/- 0.01, r-chi c0(chi c2) = 0.56 +/- 0.10 +/- 0.01 and r-eta c(1s)(eta c(2s)) = 0.040 +/- 0.011 +/- 0.004. here and below the first uncertainties are statistical and the second systematic. upper limits at 90% confidence level for the inclusive production of x(3872), x(3915) and.c2(2p) states are obtained as r-chi c1(x(3872)) < 0.34, r-chi c0(x(3915)) < 0.12 and r-chi c2(chi c2(2p)) < 0.16. differential cross-sections as a function of transverse momentum are measured for the eta(c)(1s) and chi(c) states. the branching fraction of the decay b-s(0). phi phi phi is measured for the first time, b(b-s(0) -> phi phi phi) = (2.15 +/- 0.54 +/- 0.28 +/- 0.21 b) x10(-6). here the third uncertainty is due to the branching fraction of the decay b-s(0) -> phi phi, which is used for normalization. no evidence for intermediate resonances is seen. a preferentially transverse phi polarization is observed. themeasurements allow the determination of the ratio of the branching fractions for the eta(c)(1s) decays to ff and p (p) over bar as b(eta(c)(1s) -> phi phi)/b(eta(c)(1s) -> p (p) over bar) = 1.79 +/- 0.14 +/- 0.32. |
| WOS关键词 | BRANCHING FRACTIONS ; PP COLLISIONS ; J/PSI ; POLARIZATION ; ETA(C)(2S) ; DETECTOR ; PSI(2S) ; TOOL ; TEV |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000410893100005 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177052 |
| 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, Rio de Janeiro, Brazil 3.Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China 4.Univ Savoie Mt 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. Study of charmonium production in b-hadron decays and first evidence for the decay b-s(0) -> phi phi phi[J]. European physical journal c,2017,77(9):18. |
| APA | Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2017).Study of charmonium production in b-hadron decays and first evidence for the decay b-s(0) -> phi phi phi.European physical journal c,77(9),18. |
| MLA | Aaij, R.,et al."Study of charmonium production in b-hadron decays and first evidence for the decay b-s(0) -> phi phi phi".European physical journal c 77.9(2017):18. |
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