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dc.contributor.authorBaumann, Daniel
dc.contributor.authorGreen, D
dc.contributor.authorWallisch, Benjamin
dc.date.accessioned2018-09-11T17:32:32Z
dc.date.available2018-09-11T17:32:32Z
dc.date.issued2018-08
dc.identifier.issn1475-7516
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/280202
dc.description.abstractLight thermal relics of the hot big bang, often quantified by the parameter $N_\mathrm{eff}$, are one of the primary targets of cosmological measurements. At present, the energy density in such relics is constrained to be less than ten percent of the total energy density in radiation. Upcoming cosmic microwave background (CMB) experiments, however, have the potential to measure the radiation density at the one-percent level, which is close to well-motivated theoretical targets. In this paper, we explore to what degree the CMB observations can be enhanced by future large-scale structure surveys. We carefully isolate the information encoded in the shape of the galaxy power spectrum and in the spectrum of baryon acoustic oscillations (BAO). We find that measurements of the shape of the power spectrum can significantly improve on current and near-term CMB experiments. We also show that the phase shift of the BAO spectrum induced by relic neutrinos can be detected at high significance in future experiments.
dc.publisherIOP Publishing
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleSearching for light relics with large-scale structure
dc.typeArticle
prism.issueIdentifier8
prism.publicationDate2018
prism.publicationNameJournal of Cosmology and Astroparticle Physics
prism.volume2018
dc.identifier.doi10.17863/CAM.27569
rioxxterms.versionofrecord10.1088/1475-7516/2018/08/029
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-08-21
dc.contributor.orcidWallisch, Benjamin [0000-0001-5713-1720]
dc.identifier.eissn1475-7516
dc.publisher.urlhttp://dx.doi.org/10.1088/1475-7516/2018/08/029
rioxxterms.typeJournal Article/Review
pubs.funder-project-idScience and Technology Facilities Council (ST/M007065/1)
cam.issuedOnline2018-08-21


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International