2born (2born) wrote,
2born
2born

An Introduction to Webs

http://arxiv.org/abs/1507.02167

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 tantalising 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.

Comments:     Invited lecture notes for Journal of Physics G. Comments welcome. 42 pages, 19 figures
Tags: наука, разгребая arXiv'ы
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