A worldline approach to QCD amplitudes

by Dr. Olindo Corradini (Universidad Autónoma de Chiapas / Università di Modena e Reggio Emilia (Italy))

Wednesday, 26 August 2015 from 13:00 to 14:00 (Mexico/General)
at ICN-UNAM ( Salon de seminarios de Gravitación y Altas Energias )

Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Avenida Universidad No. 3000, Col. UNAM-C.U. Distrito Federal, C.P. 04510, México

Description

The worldline formalism is an alternative approach, to 
conventional quantum field theory techniques (second 
quantization), to the calculation of Feynman diagrams by 
means of the path-integral quantization of simple particle 
models, and is particularly suitable in the presence of 
external fields. In this seminar, we start deriving the 
main rules of the formalism for the simple case of scalar 
QED, and then move to a relativistic particle model coupled 
to nonabelian gauge fields, that represents a worldline
approach to QCD. Here we employ auxiliary fields to 
implement the path-ordering needed for gauge-covariance, 
and we show how to compute tree-level and one-loop 
amplitudes.

Material:

Slides

Support

Email: alexis@nucleares.unam.mx