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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/128969
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dc.contributor.authorBen-Dayan, Ido-
dc.contributor.authorKonstandin, Thomas-
dc.contributor.authorPorto, Rafael A.-
dc.contributor.authorSagunski, Laura-
dc.date.accessioned2015-10-21T19:59:50Z-
dc.date.accessioned2016-10-25T21:08:01Z-
dc.date.available2015-10-21T19:59:50Z-
dc.date.available2016-10-25T21:08:01Z-
dc.date.issued2015-02-01-
dc.identifierhttp://iopscience.iop.org/article/10.1088/1475-7516/2015/02/026/meta-
dc.identifier.citationJournal Of Cosmology And Astroparticle Physics. Bristol: Iop Publishing Ltd, n. 2, 22 p., 2015.-
dc.identifier.issn1475-7516-
dc.identifier.urihttp://hdl.handle.net/11449/128969-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/128969-
dc.description.abstractWe study soft limits of correlation functions for the density and velocity fields in the theory of structure formation. First, we re-derive the (resummed) consistency conditions at unequal times using the eikonal approximation. These are solely based on symmetry arguments and are therefore universal. Then, we explore the existence of equal-time relations in the soft limit which, on the other hand, depend on the interplay between soft and hard modes. We scrutinize two approaches in the literature: the time-flow formalism, and a background method where the soft mode is absorbed into a locally curved cosmology. The latter has been recently used to set up (angular averaged) 'equal-time consistency relations'. We explicitly demonstrate that the time-flow relations and 'equal-time consistency conditions'are only fulfilled at the linear level, and fail at next-to-leading order for an Einstein de-Sitter universe. While applied to the velocities both proposals break down beyond leading order, we find that the 'equal-time consistency conditions'quantitatively approximates the perturbative results for the density contrast. Thus, we generalize the background method to properly incorporate the effect of curvature in the density and velocity fluctuations on short scales, and discuss the reasons behind this discrepancy. We conclude with a few comments on practical implementations and future directions.en
dc.description.sponsorshipGerman Science Foundation (DFG) within the Collaborative Research Center 'Particles, Strings and the Early Universe'-
dc.format.extent22-
dc.language.isoeng-
dc.publisherIop Publishing Ltd-
dc.sourceWeb of Science-
dc.subjectcosmological perturbation theoryen
dc.subjectpower spectrumen
dc.titleOn soft limits of large-scale structure correlation functionsen
dc.typeoutro-
dc.contributor.institutionDeutsch Elektronen Synchrotron DESY-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationDeutsch Elektronen Synchrotron DESY, Theory Grp, D-22607 Hamburg, Germany-
dc.description.affiliationUniv Estadual Paulista, UNESP, Inst Fis Teor, ICTP South Amer Inst Fundamental Res, BR-01140070 Sao Paulo, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Inst Fis Teor, ICTP South Amer Inst Fundamental Res, BR-01140070 Sao Paulo, Brazil-
dc.description.sponsorshipIdGerman Science Foundation (DFG) within the Collaborative Research Center 'Particles, Strings and the Early Universe': (SFB) 676-
dc.identifier.doihttp://dx.doi.org/10.1088/1475-7516/2015/02/026-
dc.identifier.wosWOS:000351502100027-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal Of Cosmology And Astroparticle Physics-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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