2013/04/30 by Constantinos Pallis, C. Pallis, Qaisar Shafi · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #CMB cold spot #Cosmic microwave background #Cosmology and Gravitation Theories #Inflation (cosmology) #Leptogenesis #Lepton #Mathematical physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Planck #Quantum mechanics #Scalar (mathematics) #Spectral index #Spectral line #Spontaneous symmetry breaking #Supergravity #Superpotential #Supersymmetry #Supersymmetry breaking #Symmetry breaking #Theoretical physics #astro-ph.CO #hep-ph
paper · pdf · doi:10.1016/j.physletb.2013.07.029
published as Physics Letters B 725 (2013) 327 · Minor corrections regarding the calculation of the tension of the cosmic strings
openalex publication_date 2013/07/17 · arxiv created 2013/12/16 · arxiv updated 2013/12/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The minimal supersymmetric (or F-term) hybrid inflation is defined by a unique renormalizable superpotential, fixed by a U(1) R-symmetry, and it employs a canonical Kähler potential. The inflationary potential takes into account both radiative and supergravity corrections, as well as an important soft supersymmetry breaking term, with a mass coefficient in the range (0.1–10) TeV. The latter term assists in obtaining a scalar spectral index ns close to 0.96, as strongly suggested by the PLANCK and WMAP 9 yr measurements. The minimal model predicts that the tensor-to-scalar r is extremely tiny, of order 10−12, while the spectral index running, |dns/dlnk|∼10−4. If inflation is associated with the breaking of a local U(1)B−L symmetry, the corresponding symmetry breaking scale M is (0.7–1.6)⋅1015 GeV with ns≃0.96. This scenario is compatible with the bounds on M from cosmic strings, formed at the end of inflation from B−L symmetry breaking. We briefly discuss non-thermal leptogenesis which is readily implemented in this class of models.