The QCD coupling constant from tau decays

被引：0
|
作者：
Samuel, MA [1 ]
机构：
[1] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA
来源：
JINGSHIN THEORETICAL PHYSICS SYMPOSIUM IN HONOR OF PROFESSOR TA-YOU WU | 1998年
关键词：
D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
We suggest that naive perturbation theory up to 0(alpha(s)(3)) underestimates the theoretical prediction for R-tau = Gamma[tau(-) --> nu(tau) + hadrons]/Gamma[tau(-) --> nu(tau)e-<(nu)over bar>(e)]. We use Pade Summation (PS) and find alpha(s)(M-z) = .313 (9). Using the new 4-loop QCD beta-function, we find alpha(s)(M-z) = .1172 (11) in agreement with recent values.
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收藏
页码：353 / 361
页数：9
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