Theoretical Introduction to B Decays and the Soft-Collinear Effective Theory

Details Theoretical Introduction to B Decays and the Soft-Collinear Effective Theory Theoretical Introduction to B Decays and the Soft-Collinear Effective Theory

2003-08-19

arxiv.org/abs/hep-ph/0308185v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, talk given at the XXXVIIIth Rencontres de Moriond, QCD and Hadronic Interactions

Scientific paper

In this talk I give an introduction to methods used to give a model independent description of QCD effects in B-decays. I discuss three useful expansions: mb/mW << 1 for the electroweak Hamiltonian, LambdaQCD/mb << 1 for Heavy Quark Effective theory, and LambdaQCD/Q << 1 for the Soft-Collinear Effective Theory where Q ~ mb is the large energy of light final state hadrons. I discuss predictions that can be made with each expansion.

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