Effective field theory and the quark model
نویسندگان
چکیده
منابع مشابه
On the Renormalization of Heavy Quark Effective Field Theory
The construction of heavy quark effective field theory (HqEFT) is extended to arbitrary order in both expansion parameters αs and 1/mq. Matching conditions are discussed for the general case, and it is verified that this approach correctly reproduces the infrared behaviour of full QCD. Choosing a renormalization scheme in the full theory fixes the renormalization scheme in the effective theory ...
متن کاملEffective Field Theory and Heavy Quark Physics ( 2004
These notes are based on five lectures presented at the 2004 Theoretical Advanced Study Institute (TASI) on “Physics in D ≥ 4”. After a brief motivation of flavor physics, they provide a pedagogical introduction to effective field theory, the effective weak Lagrangian, and the technology of renormalization-group improved perturbation theory. These general methods are then applied in the context...
متن کاملEffective Heavy Quark Theory
We show how heavy quark effective theory, including 1 MQ corrections, may be matched onto dynamical quark models by making a specific choice of Kμ,m and vμ in the pμ = mvμ + Kμ expansion. We note that Wigner rotations of heavy quark spins arise at O(p2/m2) in non-relativistic models but at O(ΛQCD/MQ) or O(velocity − transfer) in HQET and so are necessary for a consistent treatment. May 1992 FEC...
متن کاملLight Quark Effective Theory
The application of effective field theory methods to the low energy structure of QCD is discussed. The analysis relies on the fact that three of the quark masses happen to be light, so that QCD exhibits an approximate chiral symmetry. The Goldstone bosons associated with the spontaneous breakdown of this symmetry represent the essential degrees of freedom at low energies. I emphasize the univer...
متن کاملHeavy-Quark Effective Theory
We give an introduction to the heavy-quark effective theory and the 1/mQ expansion, which provide the modern framework for a systematic, model-independent description of the properties and decays of hadrons containing a heavy quark. We discuss the applications of these concepts to spectroscopy and to the weak decays of B mesons. Lectures presented at the 34th International School of Subnuclear ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2001
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.64.014008