Gravitational wave consistency relations for multifield inflation

Show simple item record Price, LC en Peiris, HV en Frazer, J en Easther, Richard en 2016-01-14T00:06:27Z en 2015-01 en
dc.identifier.citation Physical Review Letters, 2015, 114 (3), pp. 031301-1 - 031301-6 en
dc.identifier.issn 0031-9007 en
dc.identifier.uri en
dc.description.abstract We study the tensor spectral index n(t) and the tensor-to-scalar ratio r in the simplest multifield extension to single-field, slow-roll inflation models. We show that multifield models with potentials V∼[under ∑]iλ_{i}|ϕ_{i}|^{p} have different predictions for n(t)/r than single-field models, even when all the couplings are equal λ_{i}=λ_{j}, due to the probabilistic nature of the fields' initial values. We analyze well-motivated prior probabilities for the λ_{i} and initial conditions to make detailed predictions for the marginalized probability distribution of n(t)/r. With O(100) fields and p>3/4, we find that n(t)/r differs from the single-field result of n(t)/r=-1/8 at the 5σ level. This gives a novel and testable prediction for the simplest multifield inflation models. en
dc.description.uri en
dc.format.medium Print-Electronic en
dc.language eng en
dc.publisher American Physical Society en
dc.relation.ispartofseries Physical Review Letters en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
dc.rights.uri en
dc.rights.uri en
dc.title Gravitational wave consistency relations for multifield inflation en
dc.type Journal Article en
dc.identifier.doi 10.1103/PhysRevLett.114.031301 en
pubs.issue 3 en
pubs.begin-page 031301-1 en
pubs.volume 114 en
dc.description.version AM - Accepted Manuscript en
dc.rights.holder Copyright: American Physical Society en
dc.identifier.pmid 25658992 en en
pubs.end-page 031301-6 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 456481 en Science en Physics en
pubs.arxiv-id 1409.2498 en
dc.identifier.eissn 1079-7114 en
pubs.record-created-at-source-date 2016-01-14 en
pubs.dimensions-id 25658992 en

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