QCD Corrections to e+e-→J/ψ plus gg at B Factories

被引：77
|
作者：
Ma, Yan-Qing [1 ,2 ]
Zhang, Yu-Jie [1 ,2 ]
Chao, Kuang-Ta [1 ,2 ,3 ]
机构：
[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
[2] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[3] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 16期
基金：
中国国家自然科学基金;
关键词：
J/PSI PRODUCTION; E(+)E(-); ANNIHILATION;
D O I：
10.1103/PhysRevLett.102.162002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In heavy quarkonium production, the measured ratio R-cc=sigma[J/psi+cc+X]/sigma[J/psi+X] at B factories is much larger than existing theoretical predictions. To clarify this discrepancy, in nonrelativistic QCD we find the next-to-leading-order (NLO) QCD correction to e(+)e(-)-> J/psi+gg can enhance the cross section by about 20%. Together with the calculated NLO result for e(+)e(-)-> J/psi+cc, we show that the NLO corrections can significantly improve the fit to the ratio R-cc. The effects of leading logarithm resummation near the end point on the J/psi momentum distribution and total cross section are also considered. Comparison of the calculated cross section for e(+)e(-)-> J/psi+gg with the observed cross section for e(+)e(-)-> J/psi+non-(cc) is expected to provide unique information on the issue of color-octet contributions.
引用
收藏
页数：4
相关论文
共 50 条
  • [41] Measurement of Γee(j/ψ)•B(J/ψ → e+e-) and Γee(j/ψ)•B(J/ψ → μ+μ-)
    Baldin, Evgeny M.
    35TH INTERNATIONAL CONFERENCE OF HIGH ENERGY PHYSICS (ICHEP 2010), 2010,
  • [42] Measurement of Γee(J/ψ) . B(J/ψ → e+e-) and Γee (J/ψ) . B(J/ψ → μ+μ-)
    Anashin, V. V.
    Aulchenko, V. M.
    Baldin, E. M.
    Barladyan, A. K.
    Barnyakov, A. Yu.
    Barnyakov, M. Yu.
    Baru, S. E.
    Bedny, I. V.
    Beloborodova, O. L.
    Blinov, A. E.
    Blinov, V. E.
    Bobrov, A. V.
    Bobrovnikov, V. S.
    Bogomyagkov, A. V.
    Bondar, A. E.
    Bondarev, D. V.
    Buzykaev, A. R.
    Eidelman, S. I.
    Glukhovchenko, Yu. M.
    Gulevich, V. V.
    Gusev, D. V.
    Karnaev, S. E.
    Karpov, G. V.
    Karpov, S. V.
    Kharlamova, T. A.
    Kiselev, V. A.
    Kononov, S. A.
    Kotov, K. Yu.
    Kravchenko, E. A.
    Kulikov, V. F.
    Kurkin, G. Ya.
    Kuper, E. A.
    Levichev, E. B.
    Maksimov, D. A.
    Malyshev, V. M.
    Maslennikov, A. L.
    Medvedko, A. S.
    Meshkov, O. I.
    Mishnev, S. I.
    Morozov, I. I.
    Muchnoi, N. Yu.
    Neufeld, V. V.
    Nikitin, S. A.
    Nikolaev, I. B.
    Okunev, I. N.
    Onuchin, A. P.
    Oreshkin, S. B.
    Orlov, I. O.
    Osipov, A. A.
    Peleganchuk, S. V.
    PHYSICS LETTERS B, 2010, 685 (2-3) : 134 - 140
  • [43] Mixed QCD-electroweak corrections for Higgs boson production at e+e- colliders
    Gong, Yinqiang
    Li, Zhao
    Xu, Xiaofeng
    Yang, Li Lin
    Zhao, Xiaoran
    PHYSICAL REVIEW D, 2017, 95 (09)
  • [44] ON THE LARGE QCD CORRECTIONS TO THE MULTIJET DIFFERENTIAL CROSS-SECTIONS IN E+E- ANNIHILATION
    ROSS, DA
    NUCLEAR PHYSICS B, 1981, 188 (01) : 109 - 117
  • [45] NLO QCD matrix elements plus parton showers in e+e- → hadrons
    Gehrmann, Thomas
    Hoeche, Stefan
    Krauss, Frank
    Schoenherr, Marek
    Siegert, Frank
    JOURNAL OF HIGH ENERGY PHYSICS, 2013, (01):
  • [46] The QCD pomeron in e+e- collisions
    Kwiecinski, J
    Motyka, L
    ACTA PHYSICA POLONICA B, 1999, 30 (06): : 1817 - 1836
  • [47] QCD tests at e+e- colliders
    Bethke, S
    NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 1998, 64 : 54 - 62
  • [48] Radiative return at e+e- factories.
    Czyz, H
    Kühn, JH
    Rodrigo, G
    NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2003, 116 : 249 - 253
  • [49] Understanding the cross section of e+e- → ηJ/ψ process via nonrelativistic QCD
    Qiao, Cong-Feng
    Zhu, Rui-Lin
    PHYSICAL REVIEW D, 2014, 89 (07):
  • [50] Perturbative QCD analysis of exclusive J/ψ+ηc production in e+e- annihilation
    Choi, Ho-Meoyng
    Ji, Chueng-Ryong
    PHYSICAL REVIEW D, 2007, 76 (09)
12345