Sneutrino hybrid inflation in supergravity

Journal Article · Fri Apr 15 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.083519· OSTI ID:20709070

Antusch, Stefan; King, Steve F ^[1]; Bastero-Gil, Mar ^[2]; Shafi, Qaisar ^[3]

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1. School of Physics and Astonomy, University of Southampton, Southampton, SO17 1BJ (United Kingdom)
2. Departamento de Fisica Teorica y del Cosmos and Centro Andaluz de Fisica de Particulas Elementales (CAFPE), Universidad de Granada, E-19071 Granada (Spain)
3. Bartol Research Institute, University of Delaware, Newark, Delaware 19716 (United States)

We propose a hybrid inflation scenario in which the singlet sneutrino, the superpartner of the right-handed neutrino, plays the role of the inflaton. We study a minimal model of sneutrino hybrid inflation in supergravity, where we find a spectral index n{sub s}{approx_equal}1+2{gamma} with vertical bar {gamma} vertical bar < or approx. 0.02, and predict a running spectral index vertical bar dn{sub s}/dlnk vertical bar << vertical bar {gamma} vertical bar and a tensor-to-scalar ratio r<<{gamma}{sup 2} for field values well below the Planck scale. In our scenario, the baryon asymmetry of our universe can be explained via nonthermal leptogenesis and a low reheat temperature T{sub RH}{approx_equal}10{sup 6} GeV can be realized.

• OSTI ID: 20709070
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BARYONS
COSMOLOGY
GEV RANGE
INFLATIONARY UNIVERSE
NEUTRINOS
SCALARS
SPARTICLES
STANDARD MODEL
SUPERGRAVITY
SUPERSYMMETRY
TENSORS
UNIVERSE