Cosmological constraints on light flavons

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dc.contributor University of Helsinki, Particle Physics and Astrophysics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Particle Physics and Astrophysics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor.author Heikinheimo, Matti
dc.contributor.author Huitu, Katri
dc.contributor.author Keus, Venus
dc.contributor.author Koivunen, Niko
dc.date.accessioned 2019-08-15T07:11:01Z
dc.date.available 2019-08-15T07:11:01Z
dc.date.issued 2019-06-14
dc.identifier.citation Heikinheimo , M , Huitu , K , Keus , V & Koivunen , N 2019 , ' Cosmological constraints on light flavons ' , Journal of High Energy Physics , no. 6 , 065 . https://doi.org/10.1007/JHEP06(2019)065 en
dc.identifier.issn 1029-8479
dc.identifier.other PURE: 126146645
dc.identifier.other PURE UUID: 69c24e45-329c-4f7c-a269-37f8eee1b6df
dc.identifier.other WOS: 000471958400007
dc.identifier.other ORCID: /0000-0002-7754-9320/work/60607949
dc.identifier.other ORCID: /0000-0003-0905-0488/work/60611660
dc.identifier.other ORCID: /0000-0002-0345-3414/work/60612728
dc.identifier.uri http://hdl.handle.net/10138/304629
dc.description.abstract The Froggatt-Nielsen mechanism is a well-motivated framework for generating the fermion mass hierarchy. This mechanism introduces flavons, complex scalars which are singlet under the Standard Model gauge symmetry and charged under a new global family symmetry. We make use of a leptophilic flavon to produce the charged lepton Yukawa matrix. The real part of the flavon mixes with the Higgs boson and introduces lepton flavour violating interactions which are bounded by experiment. The imaginary part of the flavon, , is a long-lived light particle, whose abundance is restricted by cosmological observations. For m<2m(e) where the decay of to charged leptons is kinematically forbidden, we identify allowed regions of m with respect to the vacuum expectation value of the flavon field where all experimental and cosmological constraints are satisfied. en
dc.format.extent 19
dc.language.iso eng
dc.relation.ispartof Journal of High Energy Physics
dc.rights en
dc.subject Beyond Standard Model en
dc.subject Cosmology of Theories beyond the SM en
dc.subject Global Symmetries en
dc.subject SEARCH en
dc.subject 115 Astronomy, Space science en
dc.title Cosmological constraints on light flavons en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1007/JHEP06(2019)065
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
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