Strong coupling constant from scaling violations in fragmentation functions

被引：37

作者：

Kniehl, BA

Kramer, G

Pötter, B

机构：

[1] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg, Germany

[2] Werner Heisenberg Inst, Max Planck Inst Phys, D-80805 Munich, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.85.5288

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a new determination of the strong coupling constant tu, through the scaling violations in the fragmentation functions for charged pions, charged kaons, and protons. In our fit we include the latest e(+)e(-) annihilation data from CERN LEP1 and SLAG SLC an the Z-boson resonance and older, yet very precise, data from SLAG PEP at center-of-mass energy roots = 29 GeV. At next-to-leading order, we find alpha ((5))(s)(M-Z) = 0.1170 +/- 0.0073. A new world average of alpha (s) is given.

引用

页码：5288 / 5291

页数：4

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