Matching functions for heavy particles
Tipo
Artigo
Data de publicação
2003
Periódico
Physical Review D
Citações (Scopus)
9
Autores
Bass S.D.
Crewther R.J.
Steffens F.M.
Thomas A.W.
Crewther R.J.
Steffens F.M.
Thomas A.W.
Orientador
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Programa
Resumo
We introduce matching functions as a means of summing heavy-quark logarithms to any order. Our analysis is based on Witten's approach, where heavy quarks are decoupled one at a time in a mass-independent renormalization scheme. The outcome is a generalization of the matching conditions of Bernreuther and Wetzel: we show how to derive closed formulas for summed logarithms to any order, and present explicit expressions for leading order and next-to-leading order contributions. The decoupling of heavy particles in theories lacking asymptotic freedom is also considered. © The American Physical Society.