In-Medium Chiral Perturbation Theory and Pion Weak Decay in the Presence of Background Matter
| dc.creator | Kirchbach, Mariana | |
| dc.creator | Wirzba, Andreas | |
| dc.date | 1997-01-07 | |
| dc.date.accessioned | 2026-07-07T06:22:05Z | |
| dc.date.available | 2026-07-07T06:22:05Z | |
| dc.description | Two-point functions related to the pion weak decay constant f_πare calculated from the generating functional of chiral perturbation theory in the mean-field approximation and the heavy-baryon limit. The aim is to demonstrate that Lorentz invariance is violated in the presence of background matter. This fact manifests itself in the splitting of both f_πand the pion mass into uncorrelated time- and spacelike parts. We emphasize the different in-medium renormalizations of the correlation functions, show the inequivalence between the in-medium values of f_πdeduced from Walecka-type models, on the one hand, and QCD sum rules, on the other hand, and elaborate on the importance for some nuclear physics observables. | |
| dc.description | 14 pages, RevTex, no figures, to appear in Nucl.Phys. A | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9701237 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9701237 | |
| dc.identifier | Nucl.Phys. A616 (1997) 648-658 | |
| dc.identifier | doi:10.1016/S0375-9474(97)81120-7 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/95806 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Nuclear Theory | |
| dc.title | In-Medium Chiral Perturbation Theory and Pion Weak Decay in the Presence of Background Matter | |
| dc.type | text |