Tachyonic preheating using 2PI-1/N dynamics and the classical approximation

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dc.creatorArrizabalaga, Alejandro
dc.creatorSmit, Jan
dc.creatorTranberg, Anders
dc.date2004-09-15
dc.date2004-11-27
dc.date.accessioned2026-07-07T10:49:14Z
dc.date.available2026-07-07T10:49:14Z
dc.descriptionWe study the process of tachyonic preheating using approximative quantum equations of motion derived from the 2PI effective action. The O(N) scalar (Higgs) field is assumed to experience a fast quench which is represented by an instantaneous flip of the sign of the mass parameter. The equations of motion are solved numerically on the lattice, and the Hartree and 1/N-NLO approximations are compared to the classical approximation. Classical dynamics is expected to be valid, since the occupation numbers can rise to large values during tachyonic preheating. We find that the classical approximation performs excellently at short and intermediate times, even for couplings in the larger region currently allowed for the SM Higgs. This is reassuring, since all previous numerical studies of tachyonic preheating and baryogenesis during tachyonic preheating have used classical dynamics. We also compare different initializations for the classical simulations.
dc.description32 pages, 21 figures. Published version: Some details added, section added, references added, conclusions unchanged
dc.identifierhttps://arxiv.org/abs/hep-ph/0409177
dc.identifierhttp://arxiv.org/abs/hep-ph/0409177
dc.identifierJHEP0410:017,2004
dc.identifierdoi:10.1088/1126-6708/2004/10/017
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/184153
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTachyonic preheating using 2PI-1/N dynamics and the classical approximation
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