Consistency Analysis in Renormalization-Scheme Dependence of Perturbative QCD Calculations
نویسندگان
چکیده
منابع مشابه
Renormalization scheme dependence in the case of a QCD non-power perturbative expansion
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...
متن کاملNon-perturbative renormalization of QCD
In these lectures, we discuss different types of renormalization problems in QCD and their non-perturbative solution in the framework of the lattice formulation. In particular the recursive finite size methods to compute the scale-dependence of renormalized quantities is explained. An important ingredient in the practical applications is the Schrödinger functional. It is introduced and its reno...
متن کاملRenormalization-scheme dependence of Padé summation in QCD.
We study the renormalization-scheme (RS) dependence of Padé Approximants (PA’s), and compare them with the Principle of Minimal Sensitivity (PMS) and the Effective Charge (ECH) approaches. Although the formulae provided by the PA, PMS and ECH predictions for higher-order terms in a QCD perturbation expansion differ in general, their predictions can be very close numerically for a wide range of ...
متن کاملRenormalization 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,...
متن کاملNon-perturbative renormalization of HQET and QCD
We discuss the necessity of non-perturbative renormalization in QCD and HQET and explain the general strategy for solving this problem. A few selected topics are discussed in some detail, namely the importance of off-shell improvement in the MOM-scheme on the lattice, recent progress in the implementation of finite volume schemes and then particular emphasis is put on the recent idea to carry o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1982
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.68.589