An introduction to webs

作者：White C D^*

来源：Journal of Physics G: Nuclear and Particle Physics , 2016, 43(3): 033002.

DOI：10.1088/0954-3899/43/3/033002

• perturbative QCD
• scattering amplitudes
• resummation

Webs are sets of Feynman diagrams that contribute to the exponents of scattering amplitudes, in the kinematic limit in which emitted radiation is soft. As such, they have a number of phenomenological and formal applications, and offer tantalizing glimpses into the all-order structure of perturbative quantum field theory. This article is based on a series of lectures given to graduate students, and aims to provide a pedagogical introduction to webs. Topics covered include exponentiation in (non-)abelian gauge theories, the web mixing matrix formalism for non-abelian gauge theories, and recent progress on the calculation of web diagrams. Problems are included throughout the text, to aid understanding.

• 出版日期2016-3