Introduction to Soft-Collinear Effective Theory (eBook)

Thomas Becher, Alessandro Broggio, Andrea Ferroglia (Autoren)

eBook Download: PDF

2015 | 2015
XI, 206 Seiten
Springer International Publishing (Verlag)
978-3-319-14848-9 (ISBN)

Infos

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.

Inhalt

Introduction.- The Strategy of Regions.- Scalar SCET.- Generalization to QCD.- Resummation by RG Evolution.- Threshold Resummation in Drell-Yan Production.- Transverse Momentum Resummation.- IR Divergences of Gauge Theory Amplitudes.- Outlook.- One-Loop Integrals.- Inverse Derivative Operator.- Momentum-space Freynman Rules for Soft Wilson Lines.- Wilson Lines and Gauge Transformations.- Decoupling Transformation and the Gluon Kinetic Term.- Color Space Formalism.- Anomalous Dimensions.

Produkt-Details

• Erscheint lt. Verlag: 4.3.2015
• Reihe/Serie: Lecture Notes in Physics
• Verlagsort: Cham
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Physik / Astronomie ► Atom- / Kern- / Molekularphysik
• Schlagworte: effective field theory • QCD Resummation Techniques • QFT Infrared Divergences • Renormalization Group Evolution • SCET Perturbative QCD Textbook
• ISBN-10: 3-319-14848-6 / 3319148486
• ISBN-13: 978-3-319-14848-9 / 9783319148489