ALPHA-S FROM THE LATTICE POTENTIAL

被引：5
作者：
SCHILLING, K [1 ]
BALI, GS [1 ]
机构：
[1] UNIV WUPPERTAL, DEPT PHYS, D-42097 WUPPERTAL, GERMANY
来源：
NUCLEAR PHYSICS B | 1994年
关键词：
D O I：
10.1016/0920-5632(94)90331-X
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We present an extensive study on the direct determination of the running coupling alpha(s) from the static quark antiquark force at short distances, in quenched QCD. We find from our high statistics potential analysis that alpha(qqBAR) exhibits two-loop asymptotic behaviour for momenta as low as .5 GeV. As a result, we determine the zero flavour LAMBDA-parameter to be LAMBDA(0)/MS = .630(38)square-root sigma = 293(18)-63(+25) MeV. A rough estimate of full QCD effects leads to the five flavour value alpha/MS(m(Z)) = .102(-11)+6. A comparison with other lattice results is made.
引用
收藏
页码：147 / 152
页数：6
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