Observation of the xi(-)(b) -> j/psi lambda k- decay
文献类型：期刊论文
| 作者 | Aaij, R.40; Adeva, B.39; Adinolfi, M.48; Ajaltouni, Z.5; Akar, S.59; Albrecht, J.10; Alessio, F.40; Alexander, M.53; Ali, S.43; Alkhazov, G.31 |
| 刊名 | Physics letters b
 |
| 出版日期 | 2017-09-10 |
| 卷号 | 772页码:265-273 |
| ISSN号 | 0370-2693 |
| DOI | 10.1016/j.physletb.2017.06.045 |
| 通讯作者 | Liu, x.(xilesong.liu@cern.ch) |
| 英文摘要 | The observation of the decay xi(-)(b)-> j/psi lambda k- is reported, using a data sample corresponding to an integrated luminosity of 3 fb(-1), collected by the lhcb detector in pp collisions at centre-of-mass energies of 7 and 8 tev. the production rate of xi(-)(b) baryons detected in the decay xi(-)(b) -> j/psi lambda k- is measured relative to that of lambda(0)(b) baryons using the decay lambda(0)(b) -> j/psi lambda. integrated over the b-baryon transverse momentum p(t) < 25 gev/c and rapidity 2.0 < y < 4.5, the measured ratio is f xi(-)(b/) f lambda(0)(b) b(xi(-)(b)-> j/psi lambda k-) / b(lambda(0)(b)-> j/psi lambda) = (4.19 +/- 0.29 (stat) +/- 0.15 (syst)) x 10(-2), where f(xi)(b)(-) band f(lambda)(b)(0)are the fragmentation fractions of b ->xi(-)(b)and b ->lambda(0)(b)transitions, and ss represents the branching fraction of the corresponding b- baryon decay. the mass difference between xi(-)(b) and lambda(0)(b) baryons is measured to be m(xi(-)(b))-m(lambda(0)(b)) = 177.08 +/- 0.47 (stat) +/- 0.16 (syst) mev/c(2). (c) 2017 the author(s). published by elsevier b.v. |
| WOS关键词 | DISTRIBUTIONS ; HADRONS ; BARYONS ; RATIO ; TOOL |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000411369700042 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177156 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Liu, X. |
| 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, CPPM, CNRS, IN2P3, Marseille, France 7.Univ Paris 11, LAL, CNRS, IN2P3, Orsay, France 8.Univ Paris Diderot, Univ Pierre & Marie Curie, LPNHE, CNRS IN2P3, 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. Observation of the xi(-)(b) -> j/psi lambda k- decay[J]. Physics letters b,2017,772:265-273. |
| APA | Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2017).Observation of the xi(-)(b) -> j/psi lambda k- decay.Physics letters b,772,265-273. |
| MLA | Aaij, R.,et al."Observation of the xi(-)(b) -> j/psi lambda k- decay".Physics letters b 772(2017):265-273. |
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来源：高能物理研究所
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