Double-charm production e+e-→J/ψ+c(c)over-bar at B factories with next-to-leading-order QCD corrections

被引:90
作者
Zhang, Yu-Jie [1 ]
Chao, Kuang-Ta
机构
[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
[2] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
关键词
D O I
10.1103/PhysRevLett.98.092003
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The inclusive J/psi production in e(+)e(-)-> J/psi cc at B factories is one of the most challenging open problems in heavy quarkonium physics. The observed cross section of this double-charm production process is larger than existing leading order (LO) QCD predictions by a factor of 5. In the nonrelativistic QCD (NRQCD) factorization formalism, we calculate the next-to-leading order (NLO) QCD virtual and real corrections to this process, and find that these corrections can substantially enhance the cross section with a K factor of about 1.8. We further take into account the feeddown contributions from higher charmonium states [mainly the psi(2S) as well as chi(cJ)] and the two-photon contributions, and find that the discrepancy between theory and experiment can be largely removed.
引用
收藏
页数:4
相关论文
共 36 条
[1]  
Abe K, 2002, PHYS REV LETT, V89, DOI [10.1103/PhysRevLett.89.122001, 10.1103/PhysRevLett.89.142001]
[2]  
Aubert B, 2005, PHYS REV D, V72, DOI [10.1103/PhysRevD.72.011102, 10.1103/PhysRevD.72.032005, 10.1103/PhysRevD.72.051101]
[3]  
Baek SW, 1998, J KOREAN PHYS SOC, V33, P97
[4]   Exclusive two-vector-meson production from e+e- annihilation [J].
Bodwin, Geoffrey T. ;
Braaten, Eric ;
Lee, Jungil ;
yu, Chaehn Yu .
PHYSICAL REVIEW D, 2006, 74 (07)
[5]   RIGOROUS QCD ANALYSIS OF INCLUSIVE ANNIHILATION AND PRODUCTION OF HEAVY QUARKONIUM [J].
BODWIN, GT ;
BRAATEN, E ;
LEPAGE, GP .
PHYSICAL REVIEW D, 1995, 51 (03) :1125-1171
[6]   Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium (vol 51, pg 1125, 1995) [J].
Bodwin, GT ;
Braaten, E ;
Lepage, GP .
PHYSICAL REVIEW D, 1997, 55 (09) :5853-5854
[7]  
BODWIN GT, HEPPH0611002
[8]   Is the Belle result for the cross section or (e+e-→J/ψ+ηc) a real difficulty for QCD? [J].
Bondar, AE ;
Chernyak, VL .
PHYSICS LETTERS B, 2005, 612 (3-4) :215-222
[9]   Exclusive double-charmonium production from e+e- annihilation into a virtual photon -: art. no. 054007 [J].
Braaten, E ;
Lee, J .
PHYSICAL REVIEW D, 2003, 67 (05)
[10]   Excited charmonium mesons production in e+e- annihilation at √s=10.6 GeV -: art. no. 074019 [J].
Braguta, VV ;
Likhoded, AK ;
Luchinsky, AV .
PHYSICAL REVIEW D, 2005, 72 (07)