VIII International Conference "Models in Quantum Field Theory"

Three-loop singularity structure of a principal chiral field model

Oct 6, 2025, 5:20 PM

20m

Room 1, 1st floor

Session talk Section C: Field theoretical methods in statistical physics Section C: Field theoretical methods in statistical physics

Speaker

Pavel Akacevich (PDMI RAS)

Description

The talk is devoted to the three-loop renormalization of the effective action for a two-dimensional pricipal chiral field model using the background field method and a cutoff regularization in the coordinate representation. The coefficients of the renormalization constant and the necessary auxiliary vertices are found. Asymptotic expansions for all three-loop diagrams and their dependence on the type of regularization function are also studied.

Presentation materials

Akacevic_mqft.pdf