Inclusive production of h c ( h b ) states via e + e − annihilation
Inclusive production of h c ( h b ) states via e + e − annihilation
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DOI：
10.1103/physrevd.86.074012
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发表时间：
2012-07
影响因子：
5
通讯作者：
Jian-xiong Wang;Hong-Fei Zhang
中科院分区：
文献类型：
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作者：
Jian-xiong Wang;Hong-Fei Zhang
我们计算了 e(+)e(-) 对撞机上 h(c) (h(b)) 的包容性产生，其质心能量从 CLEO-c 能量到非相对论 QCD 前导阶的 Z(0) 玻色子质量。在 Z(0) 玻色子质量处，横截面为 39 类似于 h(c) (1P) 的 703 fb，37 类似于 h(b) (1P) 的 61 fb，以及 44 类似于 h(b) (2P) 的 73 fb。在 B 工厂，h(c) (1P) 的值为 86，类似于 212 fb。对于 CLEO-c 处的 h(c) 和 B 工厂处的 h(b) (1P, 2P)，扰动 QCD 展开效果不佳，结果远小于实验测量值。所有结果都清楚地表明，颜色八位态（S-1（0）8）占主导地位，而颜色单态（P-1（1）1）贡献很小甚至负部分，这与发现颜色单态占主导地位的包容性J/psi产生的情况形成鲜明对比。
We calculate the inclusive production of h(c) (h(b)) at e(+)e(-) colliders with the center-of-mass energy from the CLEO-c energy to Z(0) boson mass at leading order of nonrelativistic QCD. At Z(0) boson mass, the cross sections are 39 similar to 703 fb for h(c) (1P), 37 similar to 61 fb for h(b) (1P), and 44 similar to 73 fb for h(b) (2P). At the B-factories, it is 86 similar to 212 fb for h(c) (1P). For h(c) at the CLEO-c and h(b) (1P, 2P) at the B-factories, the perturbative QCD expansion is not good and the results are much smaller than the experimental measurements. It is clearly shown in all the results that the color-octet state (S-1(0)8) contributes dominantly while the color-singlet state (P-1(1)1) contributes a small or even negative part, in contrast to the case of inclusive J/psi production where the color-singlet state is found to contribute dominantly.