dc.contributor.author |
Price, LC |
en |
dc.contributor.author |
Peiris, HV |
en |
dc.contributor.author |
Frazer, J |
en |
dc.contributor.author |
Easther, Richard |
en |
dc.date.accessioned |
2016-01-14T00:06:27Z |
en |
dc.date.issued |
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 |
http://hdl.handle.net/2292/27978 |
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 |
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.031301#fulltext |
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 http://www.sherpa.ac.uk/romeo/issn/0031-9007/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.rights.uri |
http://creativecommons.org/licenses/by/3.0/ |
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 |
pubs.author-url |
http://journals.aps.org/prl/pdf/10.1103/PhysRevLett.114.031301 |
en |
pubs.end-page |
031301-6 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/OpenAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
456481 |
en |
pubs.org-id |
Science |
en |
pubs.org-id |
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 |