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Particle decay during inflation: Self-decay of inflaton quantum fluctuations during slow roll

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 13 Jan 2005Embargo end date: 01 Jan 2004 France English Publisher:American Physical Society (APS)Journal:Physical Review D, volume 71 (issn: 1550-7998, eissn: 1550-2368, Copyright policy )Funded by:NSF | Equilibrium and Nonequili...
Authors: Boyanovsky, D.; de Vega, H. J.; Sanchez, N. G.;

doi: 10.1103/physrevd.71.023509 , 10.48550/arxiv.astro-ph/0409406

arXiv: astro-ph/0409406

Particle decay during inflation: Self-decay of inflaton quantum fluctuations during slow roll

Abstract

Particle decay during inflation is studied by implementing a dynamical renormalization group resummation combined with a small Delta expansion. Delta measures the deviation from the scale invariant power spectrum and regulates the infrared. In slow roll inflation, Delta is a simple function of the slow roll parameters epsilon_V, eta_V.We find that quantum fluctuations can self-decay as a consequence of the inflationary expansion through processes which are forbidden in Minkowski space-time. We compute the self-decay of the inflaton quantum fluctuations during slow roll inflation.For wavelengths deep inside the Hubble radius the decay is enhanced by the emission of ultrasoft collinear quanta, i.e. bremsstrahlung radiation of superhorizon quanta which becomes the leading decay channel for physical wavelengths H<3.6 10^{-9}.

27 pages, LaTex, 5 .eps figures, to appear in Phys. Rev. D

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Keywords

High Energy Physics - Theory, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [PHYS.GRQC] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], Astrophysics (astro-ph), 500, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], Astrophysics, 530, General Relativity and Quantum Cosmology, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], [PHYS.HTHE] Physics [physics]/High Energy Physics - Theory [hep-th]

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
54
Top 10%
Top 10%
Top 10%
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bronze