In this work, we provide a numerical method to obtain the Bloch-Nordsieck spectral function at finite temperature in the framework of the 2-particle-irreducible (2PI) approximation. We find that the 2PI results nicely agree with the exact one, provided we perform a coupling constant matching. In the paper, we present the resulting finite temperature running of the 2PI coupling constant. This result may apply for the finite temperature behavior of the coupling constant in QED, too.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - Aug 27 2014|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)