Mr
Jochen P. Baumann
(Max-Planck-Institut für Physik (Werner-Heisenberg-Institut))
24/08/2010, 16:12
Astro
We explore the novel possibility that the inflaton responsible for cosmological inflation is a gauge non-singlet in supersymmetric Grand Unified Theories. For definiteness we consider SUSY hybrid inflation where we show that the scalar components of gauge non-singlet superfields, together with fields in conjugate representations, may form a D-flat direction suitable for inflation.
We apply...
Dr
Mazumdar Anupam
(Lancaster University)
24/08/2010, 16:29
Astro
I will discuss the role of MSSM Higgses in the early universe cosmology. The Higgses below the hidden sector SUSY breaking scale create a mini-landscape of potential spanned by the parameter space of soft SUSY breaking terms and the non-renormalizable operators, which can support primordial inflation at high scales and electroweak symmetry breaking at low scales. The Higgses also seed...
Dr
Hyun Min Lee
(CERN)
24/08/2010, 16:46
Astro
We consider the supersymmetric version of the Higgs inflation scenario with non-minimal coupling in 4D Jordan frame supergravity. We find that there occurs a tachyonic instability along the direction of the accompanying non-inflaton field in generic Jordan frame supergravity models. We find that a higher order correction to the Jordan frame function solves the tachyonic mass problem and show...
Prof.
JoAnne Hewett
(SLAC, Stanford University)
24/08/2010, 17:03
Astro
We present a summary of recent results obtained from a scan of the 19-dimensional parameter space of the pMSSM and its implications for indirect dark matter searches. In particular, it is well-known that the MSSM cannot accomodate the recent anomalies observed by PAMELA and Fermi without the incorporation of a rather large boost factor of order 1000. We combine a scan over the astrophysical...
Mr
Tomohiro Matsuda
(Saitama Institute of Technology)
24/08/2010, 17:20
Astro
Considering the curvaton field that follows dissipative slow-roll equation, we show that the field can lead to entropy production and generation of curvature perturbation after reheating.
Prof.
Howard Baer Baer
(University of Oklahoma)
24/08/2010, 17:37
Astro
Supersymmetric models of particle physics with neutralino dark matter
tend to predict too much dark matter (the case of binos) or too little dark matter (case of winos
or higgsinos). If instead we solve the strong CP problem via PQ symmetry breaking, we
expect dark mater to be composed of an axion/axino mixture. If the PQ breaking scale is high, then
the re-heat temperature can be driven...
