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dc.contributor.authorNacir Diana López
dc.contributor.authorMazzitelli Francisco D.
dc.contributor.authorTrombetta Leonardo G.
dc.date.accessioned2019-10-25T20:01:44Z
dc.date.available2019-10-25T20:01:44Z
dc.date.created2017-09-28 23:26
dc.date.issued2016-01-01
dc.identifieroai:doaj.org/article:3c82fbf2a4de4e379c605e45b1e7a0bf
dc.identifier2100-014X
dc.identifier10.1051/epjconf/201612505019
dc.identifierhttps://doaj.org/article/3c82fbf2a4de4e379c605e45b1e7a0bf
dc.identifier.urihttp://hdl.handle.net/20.500.12424/1499830
dc.description.abstractWe present a method to compute the two-point functions for an O(N) scalar field model in de Sitter spacetime, avoiding the well known infrared problems for massless fields. The method is based on an exact treatment of the Euclidean zero modes and a perturbative one of the nonzero modes, and involves a partial resummation of the leading secular terms. This resummation, crucial to obtain a decay of the correlation functions, is implemented along with a double expansion in an effective coupling constant √λ and in 1/N. The results reduce to those known in the leading infrared approximation and coincide with the ones obtained directly in Lorentzian de Sitter spacetime in the large N limit. The new method allows for a systematic calculation of higher order corrections both in √λ and in 1/N.
dc.languageEN
dc.publisherEDP Sciences
dc.relation.ispartofhttp://dx.doi.org/10.1051/epjconf/201612505019
dc.relation.ispartofhttps://doaj.org/toc/2100-014X
dc.sourceEPJ Web of Conferences, Vol 125, p 05019 (2016)
dc.subjectPhysics
dc.subjectQC1-999
dc.titleMassless Interacting Scalar Fields in de Sitter space
dc.typeArticle
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ge.dataimportlabelOAI metadata object
ge.identifier.legacyglobethics:11561856
ge.identifier.permalinkhttps://www.globethics.net/gtl/11561856
ge.lastmodificationdate2017-09-28 23:26
ge.lastmodificationuseradmin@pointsoftware.ch (import)
ge.submissions0
ge.oai.exportid149001
ge.oai.repositoryid52
ge.oai.setnameLCC:Physics
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ge.linkhttps://doaj.org/article/3c82fbf2a4de4e379c605e45b1e7a0bf


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