Becher / Broggio / Ferroglia Introduction to Soft-Collinear Effective Theory

Erscheinungsjahr 2015
ISBN: 978-3-319-14848-9
Verlag: Springer International Publishing
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, Band 896, 206 Seiten, eBook

Reihe: Lecture Notes in Physics

Among resummation techniques for perturbative QCD in the context of collider and flavor physics, soft-collinear effective theory (SCET) has emerged as both a powerful and versatile tool, having been applied to a large variety of processes, from B-meson decays to jet production at the LHC. This book provides a concise, pedagogical introduction to this technique. It discusses the expansion of Feynman diagrams around the high-energy limit, followed by the explicit construction of the effective Lagrangian - first for a scalar theory, then for QCD. The underlying concepts are illustrated with the quark vector form factor at large momentum transfer, and the formalism is applied to compute soft-gluon resummation and to perform transverse-momentum resummation for the Drell-Yan process utilizing renormalization group evolution in SCET. Finally, the infrared structure of n-point gauge-theory amplitudes is analyzed by relating them to effective-theory operators. This text is suitable for graduate students and non-specialist researchers alike as it requires only basic knowledge of perturbative QCD.

Zielgruppe

Graduate

Autoren/Hrsg.

Becher, Thomas

Broggio, Alessandro

Ferroglia, Andrea

Inhaltsverzeichnis

From the Contents: Introduction.- The Strategy of Regions.- Scalar SCET.- Generalization to QCD.- Resummation by RG Evolution.- Threshold Resummation in Drell-Yan Production.- Transverse Momentum Resummation.- n-Jet Processes and IR Divergences of Gauge Theory Amplitudes.- Applications of SCET.- Summary of Notations and Conventions.- One-Loop Integrals.- Inverse Derivative Operator.- Wilson Lines and Gauge Transformations.- Momentum-Space Feynman Rules for Soft Wilson Lines.- Decoupling Transformation and the Gluon Kinetic Term.- Integrals for Transverse PDFs at NLO.- Color Space Formalism.- Anomalous Dimensions.