Gravitino decay in high scale supersymmetry with R -parity violation - Archive ouverte HAL
Article Dans Une Revue Physical Review D Année : 2018

Gravitino decay in high scale supersymmetry with R -parity violation

Emilian Dudas
Tony Gherghetta
  • Fonction : Auteur
Kunio Kaneta
Keith A. Olive
  • Fonction : Auteur

Résumé

We consider the effects of R-parity violation due to the inclusion of a bilinear μ′LHu superpotential term in high-scale supersymmetric models with an EeV scale gravitino as dark matter. Although the typical phenomenological limits on this coupling (e.g., due to lepton number violation and the preservation of the baryon asymmetry) are relaxed when the supersymmetric mass spectrum is assumed to be heavy (in excess of the inflationary scale of 3×1013  GeV), the requirement that the gravitino be sufficiently long lived so as to account for the observed dark matter density, leads to a relatively strong bound on μ′≲20  GeV. The dominant decay channels for the longitudinal component of the gravitino are Zν, W±l∓, and hν. To avoid an excess neutrino signal in IceCube, our limit on μ′ is then strengthened to μ′≲50  keV. When the bound is saturated, we find that there is a potentially detectable flux of monochromatic neutrinos with EeV energies.
Fichier principal
Vignette du fichier
PhysRevD.98.015030 (604.77 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01806983 , version 1 (26-02-2024)

Identifiants

Citer

Emilian Dudas, Tony Gherghetta, Kunio Kaneta, Yann Mambrini, Keith A. Olive. Gravitino decay in high scale supersymmetry with R -parity violation. Physical Review D, 2018, 98 (1), pp.015030. ⟨10.1103/PhysRevD.98.015030⟩. ⟨hal-01806983⟩
64 Consultations
16 Téléchargements

Altmetric

Partager

More