Cosmological gravitational particle production of massive spin-2 particles

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dc.citation.articleNumber181en_US
dc.citation.journalTitleJournal of High Energy Physicsen_US
dc.citation.volumeNumber2023en_US
dc.contributor.authorKolb, Edward W.en_US
dc.contributor.authorLing, Siyangen_US
dc.contributor.authorLong, Andrew J.en_US
dc.contributor.authorRosen, Rachel A.en_US
dc.date.accessioned2023-07-21T16:13:56Zen_US
dc.date.available2023-07-21T16:13:56Zen_US
dc.date.issued2023en_US
dc.description.abstractThe phenomenon of cosmological gravitational particle production (CGPP) is expected to occur during the period of inflation and the transition into a hot big bang cosmology. Particles may be produced even if they only couple directly to gravity, and so CGPP provides a natural explanation for the origin of dark matter. In this work we study the gravitational production of massive spin-2 particles assuming two different couplings to matter. We evaluate the full system of mode equations, including the helicity-0 modes, and by solving them numerically we calculate the spectrum and abundance of massive spin-2 particles that results from inflation on a hilltop potential. We conclude that CGPP might provide a viable mechanism for the generation of massive spin-2 particle dark matter during inflation, and we identify the favorable region of parameter space in terms of the spin-2 particle’s mass and the reheating temperature. As a secondary product of our work, we identify the conditions under which such theories admit ghost or gradient instabilities, and we thereby derive a generalization of the Higuchi bound to Friedmann-Robertson-Walker (FRW) spacetimes.en_US
dc.identifier.citationKolb, Edward W., Ling, Siyang, Long, Andrew J., et al.. "Cosmological gravitational particle production of massive spin-2 particles." <i>Journal of High Energy Physics,</i> 2023, (2023) Springer Nature: https://doi.org/10.1007/JHEP05(2023)181.en_US
dc.identifier.digitaljhep05-2023-181en_US
dc.identifier.doihttps://doi.org/10.1007/JHEP05(2023)181en_US
dc.identifier.urihttps://hdl.handle.net/1911/115003en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleCosmological gravitational particle production of massive spin-2 particlesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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