Strong coupling constant from bottomonium fine structure
نویسندگان
چکیده
منابع مشابه
The strong coupling constant
In this paper we fix our attention, on hadron structure, and show that also the strong interaction strength αS, ordinarily called the “(perturbative) coupling–constant square”, can be evaluated within our theory, and found to decrease (increase) as the “distance” r decreases (increases). This yields both the confinement of the hadron constituents, and their asymptotic freedom: in qualitative ag...
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We compute the QCD running coupling on the lattice as deened from the 3-gluon vertex. We present the results of an exploratory study at = 6:0 on a 16 4 lattice, which show that for momenta larger than 2 GeV, the coupling runs according to the 2-loop asymptotic formula, allowing a precise determination of the parameter. Our renormalization procedure corresponds to a momentum subtraction scheme i...
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The strong coupling constant is one of the fundamental parameters of the Standard Theory of particle physics. In this review I will briefly summarise the theoretical framework, within which the strong coupling constant is defined and how it is connected to measurable observables. Then I will give an historical overview of its experimental determinations and discuss the current status and world ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2000
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.62.094031