TY - JOUR
T1 - Infrared behavior of the dispersion relations in high-temperature scalar QED
AU - Abada, Abdessamad
AU - Bouakaz, Karima
N1 - Funding Information:
This work was supported by the Instituto de Salud Carlos III – Fondo Investigaciones Sanitarias (PI07/90054), European Union – European Regional Development Fund (FEDER), CIBERSAM, the government of Catalonia, Secretaria d’Universitats I Recerca del Departament d’Economia I Coneixement (2009SGR1119, 2009SGR1295), and by the Esther Koplowitz Center (Barcelona).
PY - 2006
Y1 - 2006
N2 - We investigate the infrared properties of the next-to-leading-order dispersion relations in scalar quantum electrodynamics at high temperature in the context of hard-thermal-loop perturbation theory. Specifically, we determine the damping rate and the energy for scalars with ultrasoft momenta. We show by explicit calculations that an early external-momentum expansion, before the Matsubara sum is performed, gives exactly the same result as a late one. The damping rate is obtained up to fourth order included in the ultrasoft momentum and the energy up to second order. The damping rate is found sensitive in the infrared whereas the energy is not.
AB - We investigate the infrared properties of the next-to-leading-order dispersion relations in scalar quantum electrodynamics at high temperature in the context of hard-thermal-loop perturbation theory. Specifically, we determine the damping rate and the energy for scalars with ultrasoft momenta. We show by explicit calculations that an early external-momentum expansion, before the Matsubara sum is performed, gives exactly the same result as a late one. The damping rate is obtained up to fourth order included in the ultrasoft momentum and the energy up to second order. The damping rate is found sensitive in the infrared whereas the energy is not.
KW - NLO Computations
KW - Thermal Field Theory
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U2 - 10.1088/1126-6708/2006/01/161
DO - 10.1088/1126-6708/2006/01/161
M3 - Article
AN - SCOPUS:33645506468
SN - 1029-8479
SP - 4067
EP - 4092
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 1
ER -