Renormalization scheme dependence in a QCD cross section
نویسندگان
چکیده
منابع مشابه
Renormalization Scheme Dependence in a QCD Cross Section
The zero to four loop contribution to the cross section Re+e− for e +e− −→ hadrons, when combined with the renormalization group equation, allows for summation of all leading-log (LL), next-to-leading-log (NLL) . . . N3LL perturbative contributions. It is shown how all logarithmic contributions to Re+e− can be summed and that Re+e− can be expressed in terms of the log independent contributions,...
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The running couplings such as λ(E) depend not only on the energy scale E but also on the specific rules we use to fix the finite parts of δλ(E) and other counterterms. If we change those rules — collectively known as the renormalization scheme — then for the same energy scale E we would get a slightly different running coupling λ(E) 6= λ(E). The difference is due to quantum corrections which us...
متن کاملRenormalization Scheme Dependence
The running couplings such as λ(E) depend not only on the energy scale E, but also on the specific rules we use to fix the finite parts of the δλ(E) and other counterterms. If we change those rules — collectively known as the renormalization scheme — then for the same energy scale E we would get a slightly different running coupling λ(E) 6= λ(E). The difference is due to quantum corrections whi...
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A novel, non-power, expansion of QCD quantities replacing the standard perturbative expansion in powers of the renormalized couplant a has recently been introduced and examined by two of us. Being obtained by analytic continuation in the Borel plane, the new expansion functions Wn(a) share the basic analyticity properties with the expanded quantity. In this note we investigate the renormalizati...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2016
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.94.054031