Three-loop QCD corrections and b-quark decays -: art. no. 074016

被引：12

作者：

Archambault, JP ^{[1
]}

Czarnecki, A ^{[1
]}

机构：

[1] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.70.074016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present three-loop next-to-next-to-next-to-leading order corrections to the heavy-to-heavy quark transitions in the limit of equal initial and final quark masses. In analogy with the previously found next-to-next-to-leading order corrections, the bulk of the result is due to the beta(0)(2)alpha(s)(3) corrections. The remaining genuine three-loop effects for the semileptonic b-->c decays are estimated to increase the decay amplitude by 0.2(2)%. The perturbative series for the heavy-heavy axial current converges very well.

引用

页数：5

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