QCD corrections to radiative Y decays -: art. no. 111503

被引：20

作者：

Krämer, M ^{[1
]}

机构：

[1] CERN, Div Theoret Phys, CH-1211 Geneva 23, Switzerland

来源：

PHYSICAL REVIEW D | 1999年 / 60卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.60.111503

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the next-to-leading order perturbative QCD corrections to the photon energy spectrum in radiative Y decays. The higher-order corrections significantly modify the shape of the spectrum, in particular at large photon energies, and thereby reduce the discrepancy between experimental data and previous leading-order predictions. The next-to-leading order calculation of the photon energy spectrum allows a more reliable determination of the strong coupling constant from radiative Y decays by restricting the analysis to the region of the energy spectrum that can be described by NLO perturbation theory. [S0556-2821(99)50117-3].

引用

页数：4

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