NAGIOS: RODERIC FUNCIONANDO

Gauge-invariant resummation formalism for two-point correlation functions

Repositori DSpace/Manakin

Valencià Castellano

Inici
Investigació
e-prints
22 - Física
Visualitza element

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Gauge-invariant resummation formalism for two-point correlation functions

Mostra el registre complet de l'element

Visualització (395.5Kb)

Papavassiliou, Joannis; Pilaftsis, Apostolos

Aquest document és un/a article, creat/da en: 1996

The consistent description of unstable particles, renormalons, or other Schwinger--Dyson-type of solutions within the framework of perturbative gauge field theories necessitates the definition and resummation of off-shell Green's functions, which must respect several crucial physical requirements. A formalism is presented for resummation of off-shell two-point correlation functions, which is mainly based on arguments of analyticity, unitarity, gauge invariance and renormalizability. The analytic results obtained with various methods, including the background field gauges and the pinch technique are confronted with the physical requirements imposed; to one-loop order the pinch technique approach satisfies all of them. Using renormalization group arguments, we discuss issues of uniqueness of the resummation procedure related to the latter method.

Veure al catàleg Trobes