Dark matter in minimal supergravity with type-II seesaw mechanism
- Departamento de Fisica and CFTP, Instituto Superior Tecnico, Avenida Rovisco Pais 1, 1049-001 Lisboa (Portugal)
We calculate the relic density of the lightest neutralino in a supersymmetric seesaw type-II ('triplet seesaw') model with minimal supergravity boundary conditions at the grand unified theory (GUT) scale. The presence of a triplet below the GUT scale, required to explain measured neutrino data in this setup, leads to a characteristic deformation of the sparticle spectrum with respect to the pure minimal supergravity (mSUGRA) expectations, affecting the calculated relic dark matter (DM) density. We discuss how the DM allowed regions in the (m{sub 0},M{sub 1/2}) plane change as a function of the (type-II) seesaw scale. We also compare the constraints imposed on the models parameter space form upper limits on lepton flavor violating decays to those imposed by DM. Finally, we briefly comment on uncertainties in the calculation of the relic neutralino density due to uncertainties in the measured top and bottom masses.
- OSTI ID:
- 21325488
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 9; Other Information: DOI: 10.1103/PhysRevD.80.095003; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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