QCD condensates of dimension D=6 and D=8 from hadronic τ-decays

被引：11

作者：

Almasy, A. A. ^{[1
]}

Schilcher, K. ^{[1
]}

Spiesberger, H. ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

来源：

PHYSICS LETTERS B | 2007年 / 650卷 / 2-3期

关键词：

D O I：

10.1016/j.physletb.2007.05.009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The high-precision data from hadronic tau decays allows one to extract information on QCD condensates. Using the finalized ALEPH data, we obtain a more rigorous determination of the dimension 6 and 8 condensates for the (V - A) correlator. In particular, we find that the recent data fix a certain linear combination of these QCD condensates to a precision at the level of O(2)%. Our approach relies on more general assumptions than alternative approaches based on finite energy sum rules. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：179 / 184

页数：6

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