Color-octet contributions to P-wave B-c meson hadroproduction
Color-octet contributions to P-wave B-c meson hadroproduction
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DOI：
10.1103/physrevd.71.074012
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发表时间：
2005-02
影响因子：
5
通讯作者：
Chao-Hsi Chang;C. Qiao;Jian-xiong Wang;Xing-Gang Wu
中科院分区：
文献类型：
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作者：
Chao-Hsi Chang;C. Qiao;Jian-xiong Wang;Xing-Gang Wu
颜色八元体分量|(c (b) / bar)(8)(s -1(0))g >和|(c (b) / bar)(8)(s -3(1))g >对h（Bc）或chi(Bc)(J) （p波b -c介子）haproduction的贡献是根据完整的O(alpha（s)(4)）计算来估计的。作为估计的必要输入，我们根据非相对论量子色动力学缩放规则取八元矩阵元素的值，结果，我们发现对p波产生的贡献可能与来自颜色单重态的贡献相同，|(c (b) over bar)(1)(P-1(1))>和|(c (b) over bar)(1)(P-3(J))> (J=1,2,3)。特别是，我们的结果表明，在低横动量区域观察到的彩色八元体对p波产生的贡献与目前在Tevatron和LHC上的实验能力相差不远。
The contributions from the color-octet components |(c (b) over bar)(8)(S-1(0))g > and |(c (b) over bar)(8)(S-3(1))g > to the h(Bc) or chi(Bc)(J) (the P-wave B-c meson) hadroproduction are estimated in terms of the complete O(alpha(s)(4)) calculation. As necessary inputs in the estimate, we take the values of the octet matrix elements according to the nonrelativistic quantum chromodynamics scaling rules, and as a result, we have found that the contributions to the P-wave production may be the same in order of magnitude as those from the color-singlet ones, |(c (b) over bar)(1)(P-1(1))> and |(c (b) over bar)(1)(P-3(J))> (J=1,2,3). Especially, our result indicates that the observation of the color-octet contributions to the P-wave production in the low transverse momentum region is not very far from the present experimental capability at Tevatron and LHC.