Towards order αs4 accuracy in τ decays -: art. no. 074026

被引：43

作者：

Baikov, PA ^{[1
]}

Chetyrkin, KG

Kühn, JH

机构：

[1] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119992, Russia

[2] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

[3] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany

来源：

PHYSICAL REVIEW D | 2003年 / 67卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.67.074026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently computed terms of order O(alpha(s)(4)n(f)(2)) in the perturbative series for the tau decay rate, and similar (new) strange quark mass corrections, are used to discuss the validity of various optimization schemes. The results are then employed to arrive at improved predictions for the complete terms of order O(alpha(s)(4)) and O(alpha(s)(5)) in the massless limit as well as for terms due to the strange quark mass. The phenomenological implications are presented.

引用

页数：10

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