Inclusive hc production and energy spectrum from e+e− annihilation at a super B factory

Inclusive hc production and energy spectrum from e+e− annihilation at a super B factory
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超级 B 工厂的 e( ) e(-) 湮灭的包含 h(c) 产量和能谱

DOI:
10.1103/physrevd.98.014039
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发表时间:
2018-01
期刊:
Phys. Rev. D
影响因子:
--
通讯作者:
Ruilin Zhu
Ruilin Zhu
中科院分区:
其他
文献类型:
--
作者:
Qing-Feng Sun;Yu Jia;Xiaohui Liu;Ruilin Zhu

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在非相对论framework.TheanalyticexpressionfortheNLOshort-distancecoefficient(SDC)accompanyingthecoloroctet因式分解下,计算了超B工厂电子−湮灭中色八重态HC包含性产生的次前级辐射修正,得到了虚修正和实修正之和。对于颜色-八位组产生通道的NLO校正的大小被发现是正的和实质性的。对HC能谱的NLO预测受到非物理端点奇异性的困扰。借助于软共线有效理论,这些大的端点对数被恢复到倒数第二个对数(NLL)的精度。因此,进一步补充非微扰形函数,我们得到了整个运动学范围内的HC能谱的良好预测,这有待于即将到来的Belle II实验的检验。
We calculate the next-to-leading order (NLO) radiative correction to the color-octet hc inclusive production in eþe− annihilation at a super B factory, within the nonrelativistic QCD factorization framework.TheanalyticexpressionfortheNLOshort-distancecoefficient(SDC)accompanyingthecoloroctet production operator Ohc 8 ð1S0Þis obtained after summing both virtual and real corrections. The size of NLO correction for the color-octet production channel is found to be positive and substantial. The NLO prediction to the hc energy spectrum is plagued with unphysical end-point singularity. With the aid of the soft-collinear effective theory, those large end-point logarithms are resummed to the next-to-leading logarithmic (NLL) accuracy. Consequently, further supplemented with the nonperturbative shape function, we obtain the well-behaved predictions for the hc energy spectrum in the entire kinematic range, which awaits examination by the forthcoming Belle II experiment..
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