The infrared structure of perturbative gauge theories

Agarwal, Neelima and Magnea, Lorenzo and Signorile-Signorile, Chiara and Tripathi, Anurag (2023) The infrared structure of perturbative gauge theories. Physics Reports, 994. pp. 1-120. ISSN 03701573

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Abstract

Infrared divergences in the perturbative expansion of gauge theory amplitudes and cross sections have been a focus of theoretical investigations for almost a century. New insights still continue to emerge, as higher perturbative orders are explored, and high-precision phenomenological applications demand an ever more refined understanding. This review aims to provide a pedagogical overview of the subject. We briefly cover some of the early historical results, we provide some simple examples of low-order applications in the context of perturbative QCD, and discuss the necessary tools to extend these results to all perturbative orders. Finally, we describe recent developments concerning the calculation of soft anomalous dimensions in multi-particle scattering amplitudes at high orders, and we provide a brief introduction to the very active field of infrared subtraction for the calculation of differential distributions at colliders. © 2022 Elsevier B.V.

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IITH Creators:

IITH Creators	ORCiD
Tripathi, Anurag	https://orcid.org/0000-0002-9563-9725

Item Type:

Article

Additional Information:

LM thanks the Ministry of Human Resource Development (MHRD), Government of India and IIT Hyderabad for kind hospitality and the opportunity to present the lectures which formed the basis of the present review. AT and NA would like thank Sourav Pal for collaboration on projects that have been included in this review, for useful discussions, and help with one of the figures. AT would also like to thank the University of Turin and INFN Turin for warm hospitality during the course of this work. CSS would like to thank Calum Milloy for valuable comments on Section 6 . AT and LM would like to thank MHRD Government of India , for the GIAN grant ( 171008M01 ), The Infrared Structure of Perturbative Gauge Theories, and for the SPARC grant SPARC/2018-2019/P578/SL , Perturbative QCD for Precision Physics at the LHC, which were crucial to the completion of the review. This work was partially supported by the Italian Ministry of University and Research (MIUR), grant PRIN 20172LNEEZ . We also thank ...

Uncontrolled Keywords:

Gauge theories; Infrared divergences; Perturbative QCD; Quantum field theory

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Nov 2022 11:20

Last Modified:

23 Nov 2022 11:20