Neutrino dark matter and the Higgs portal : improved freeze-in analysis

Näytä kaikki kuvailutiedot



Pysyväisosoite

http://hdl.handle.net/10138/321799

Lähdeviite

De Romeri , V , Karamitros , D , Lebedev , O & Toma , T 2020 , ' Neutrino dark matter and the Higgs portal : improved freeze-in analysis ' , Journal of High Energy Physics , vol. 2020 , no. 10 , 137 . https://doi.org/10.1007/JHEP10(2020)137

Julkaisun nimi: Neutrino dark matter and the Higgs portal : improved freeze-in analysis
Tekijä: De Romeri, Valentina; Karamitros, Dimitrios; Lebedev, Oleg; Toma, Takashi
Tekijän organisaatio: Department of Physics
Päiväys: 2020-10-21
Kieli: eng
Sivumäärä: 41
Kuuluu julkaisusarjaan: Journal of High Energy Physics
ISSN: 1029-8479
DOI-tunniste: https://doi.org/10.1007/JHEP10(2020)137
URI: http://hdl.handle.net/10138/321799
Tiivistelmä: Sterile neutrinos are one of the leading dark matter candidates. Their masses may originate from a vacuum expectation value of a scalar field. If the sterile neutrino couplings are very small and their direct coupling to the inflaton is forbidden by the lepton number symmetry, the leading dark matter production mechanism is the freeze-in scenario. We study this possibility in the neutrino mass range up to 1 GeV, taking into account relativistic production rates based on the Bose-Einstein statistics, thermal masses and phase transition effects. The specifics of the production mechanism and the dominant mode depend on the relation between the scalar and sterile neutrino masses as well as on whether or not the scalar is thermalized. We find that the observed dark matter abundance can be produced in all of the cases considered. We also revisit the freeze-in production of a Higgs portal scalar, pointing out the importance of a fusion mode, as well as the thermalization constraints.
Avainsanat: Beyond Standard Model
CONSTRAINTS
Cosmology of Theories beyond the SM
FINITE-TEMPERATURE
MASSES
PARAMETERS
PHASE-TRANSITION
STERILE NEUTRINOS
114 Physical sciences
Vertaisarvioitu: Kyllä
Tekijänoikeustiedot: cc_by
Pääsyrajoitteet: openAccess
Rinnakkaistallennettu versio: publishedVersion


Tiedostot

Latausmäärä yhteensä: Ladataan...

Tiedosto(t) Koko Formaatti Näytä
Romeri2020_Arti ... DarkMatterAndTheHiggsP.pdf 1.478MB PDF Avaa tiedosto

Viite kuuluu kokoelmiin:

Näytä kaikki kuvailutiedot