Test of lepton universality with b-0 -> k*(0)l(+)l(-) 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; Ali, S.45; Alkhazov, G.33 |
| 刊名 | Journal of high energy physics
 |
| 出版日期 | 2017-08-16 |
| 期号 | 8页码:31 |
| 关键词 | B physics Branching fraction Hadron-hadron scattering (experiments) Rare decay |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/jhep08(2017)055 |
| 英文摘要 | A test of lepton universality, performed by measuring the ratio of the branching fractions of the b-0 -> k*(0)mu(+) mu(-) and b-0 -> k*e(+)e(-) decays, r-k*0, is presented. the k*(0) meson is reconstructed in the final state k+pi(-), which is required to have an invariant mass within 100 mev/c(2) of the known k*(892)(0) mass. the analysis is performed using proton-proton collision data, corresponding to an integrated luminosity of about 3 fb(-1), collected by the lhcb experiment at centre-of-mass energies of 7 and 8 tev. the ratio is measured in two regions of the dilepton invariant mass squared, q(2), to be r-k*0 - {0.66(-0.007)(+0.11)(stat) +/- 0.03(syst) for 0.045 < q(2) < gev2/c(4), 0.69(-0.07)(+0.11)(stat) +/- 0.05(syst) for 1.1 < q(2) < 6.0 gev2/c(4). the corresponding 95.4% confidence level intervals are [0.52, 0.89] and [0.53, 0.94]. the results, which represent the most precise measurements of r-k*0 to date, are compatible with the standard model expectations at the level of 2.1-2.3 and 2.4-2.5 standard deviations in the two q(2) regions, respectively. |
| WOS关键词 | DISTRIBUTIONS ; PACKAGE ; TOOL |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000410888900003 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177043 |
| 专题 | 高能物理研究所 |
| 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, LAPP, IN2P3, Annecy Le Vieux, France 5.Univ Blaise Pascal, CNRS, IN2P3, Clermont Univ,LPC, Clermont Ferrand, France 6.Aix Marseille Univ, CNRS, CPPM, IN2P3, Marseille, France 7.Univ Paris 11, CNRS, LAL, IN2P3, Orsay, France 8.Univ Paris 06, Univ Paris Diderot, 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. Test of lepton universality with b-0 -> k*(0)l(+)l(-) decays[J]. Journal of high energy physics,2017(8):31. |
| APA | Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2017).Test of lepton universality with b-0 -> k*(0)l(+)l(-) decays.Journal of high energy physics(8),31. |
| MLA | Aaij, R.,et al."Test of lepton universality with b-0 -> k*(0)l(+)l(-) decays".Journal of high energy physics .8(2017):31. |
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