Quantum Cosmological Correlations in an Inflating Universe: Can fermion and gauge fields loops give a scale free spectrum?

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dc.creatorChaicherdsakul, Kanokkuan
dc.date2006-11-30
dc.date2007-03-01
dc.date.accessioned2026-07-07T11:23:19Z
dc.date.available2026-07-07T11:23:19Z
dc.descriptionThis paper extends the calculation of quantum corrections to the cosmological correlation $<ζζ>$, which has been done by Weinberg for a loop of minimally coupled scalars, to other types of matter loops and a general and realistic potential. It is shown here that departures from scale invariance are never large even when Dirac, vector, and conformal scalar fields are present \emph{during} inflation. No fine tuning is needed, in the sense that effective masses or coupling constants can have arbitrary values. Even when the mass is as large as $M_{Pl}$, the one-loop result is still naturally smaller than the classical one. Thus, the results show that the existence of these fields \emph{during} inflation may not be ruled out and is consistent with natural reheating.
dc.description52 pages,v2:changed local report-no,v3 added references, corrected typos, clarified contents, accepted for publication in Physical Review D
dc.identifierhttps://arxiv.org/abs/hep-th/0611352
dc.identifierhttp://arxiv.org/abs/hep-th/0611352
dc.identifierPhys.Rev.D75:063522,2007
dc.identifierdoi:10.1103/PhysRevD.75.063522
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194854
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.titleQuantum Cosmological Correlations in an Inflating Universe: Can fermion and gauge fields loops give a scale free spectrum?
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