Secluded WIMPs, dark QED with massive photons, and the galactic center gamma-ray excess

dc.contributor.authorFortes, E. C. F. S. [UNESP]
dc.contributor.authorPleitez, V. [UNESP]
dc.contributor.authorStecker, F. W.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionNASA
dc.date.accessioned2018-11-26T16:18:59Z
dc.date.available2018-11-26T16:18:59Z
dc.date.issued2016-02-01
dc.description.abstractWe discuss a particular secluded WIMP dark matter model consisting of neutral fermions as the dark matter candidate and a Proca-Wentzel (PW) field as a mediator. In the model that we consider here, dark matter WIMPs interact with standard model (SM) particles only through the PW field of similar to MeV-multi-GeV mass particles. The interactions occur via a U(1)' mediator, V-mu', which couples to the SM by kinetic mixing with U(1) hypercharge bosons, B-mu'. One important difference between our model and other such models in the literature is the absence of an extra singlet scalar, so that the parameter with dimension of mass M-V(2) is not related to a spontaneous symmetry breaking. This QED based model is also renormalizable. The mass scale of the mediator and the absence of the singlet scalar can lead to interesting astrophysical signatures. The dominant annihilation channels are different from those usually considered in previous work. We show that the GeV-energy gamma-ray excess in the galactic center region, as derived from Fermi-LAT Gamma-ray Space Telescope data, can be attributed to such secluded dark matter WIMPs, given parameters of the model that are consistent with both the cosmological dark matter density and the upper limits on WIMP spin-independent elastic scattering. Secluded WIMP models are also consistent with suggested upper limits on a DM contribution to the cosmic-ray antiproton flux. Published by Elsevier B.V.en
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, Brazil
dc.description.affiliationNASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 14/05505-6
dc.description.sponsorshipIdFAPESP: 11/21945-8
dc.format.extent87-95
dc.identifierhttp://dx.doi.org/10.1016/j.astropartphys.2015.10.010
dc.identifier.citationAstroparticle Physics. Amsterdam: Elsevier Science Bv, v. 74, p. 87-95, 2016.
dc.identifier.doi10.1016/j.astropartphys.2015.10.010
dc.identifier.fileWOS000366784200012.pdf
dc.identifier.issn0927-6505
dc.identifier.urihttp://hdl.handle.net/11449/161064
dc.identifier.wosWOS:000366784200012
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofAstroparticle Physics
dc.relation.ispartofsjr1,242
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectSecluded dark matter
dc.subjectGamma-rays
dc.subjectAntiprotons
dc.titleSecluded WIMPs, dark QED with massive photons, and the galactic center gamma-ray excessen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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