Invariant operators in collinear effective theory
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Publication:5942452
DOI10.1016/S0370-2693(01)00902-9zbMATH Open0971.81569arXivhep-ph/0107001OpenAlexW3099163655MaRDI QIDQ5942452
Author name not available (Why is that?)
Publication date: 29 August 2001
Published in: (Search for Journal in Brave)
Abstract: We consider processes which produce final state hadrons whose energy is much greater than their mass. In this limit interactions involving collinear fermions and gluons are constrained by a symmetry, and we give a general set of rules for constructing leading and subleading invariant operators. Wilson coefficients C(mu,P) are functions of a label operator P, and do not commute with collinear fields. The symmetry is used to reproduce a two-loop result for factorization in B -> D pi in a simple way.
Full work available at URL: https://arxiv.org/abs/hep-ph/0107001
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