Login

CosPA 2013

Nov 12 – 15, 2013
Pagoda Hotel & Restaurant
Pacific/Honolulu timezone

Support

Session

Cosmology II

Nov 14, 2013, 8:30 AM
C'est Si Bon (Pagoda Hotel & Restaurant)

C'est Si Bon

Pagoda Hotel & Restaurant

1525 Rycroft St. Honolulu, HI 96814

Description

Chair: Rennan Barkana (Tel Aviv University)

Presentation materials

There are no materials yet.

  1. 35. Spontaneous Parity Breaking and Metastable Supersymmetry Breaking Vacua : cosmological constraint
    Prof. Urjit Yajnik (IIT Bombay)
    11/14/13, 8:30 AM
    Cosmology
    oral
    We study cosmology in a model with spontaneous parity breaking in the context of metastable supersymmetry breaking vacuum. We point out that such a mechanism leads to parity violation only locally, leading to the formation of a network of domain walls. We show that conflict with observed cosmology can be avoided through Planck scale suppressed terms, provided the parity breaking scale is...
    Go to contribution page
  2. 26. Domain wall and isocurvature perturbation problems in axion models
    Prof. Masahiro Kawasaki (Institute for Cosmic Ray Research, University of Tokyo)
    11/14/13, 8:55 AM
    Cosmology
    oral
    Axion models have two serious cosmological problems, domain wall and isocurvature perturbation problems.These problems may be solved if the field value of the Peccei-Quinn (PQ) scalar is large during inflation. However, the fluctuations of the PQ field grow after inflation through the parametric resonance and stable axionic strings may be produced, which results in the domain wall problem. We...
    Go to contribution page
  3. 25. Hubble-induced mass from MSSM plasma
    Mr Tomohiro Takesako (ICRR, University of Tokyo)
    11/14/13, 9:20 AM
    Cosmology
    oral
    We evaluate the effective mass of a scalar field $¥phi$ coupled to thermal plasma through Planck-suppressed interactions. We find it useful to rescale the coupled fields so that all the $¥phi$-dependences are absorbed into the yukawa and gauge couplings, which allows us to read off the leading order contributions to the effective mass $¥tilde m_{¥phi}$ from the 2-loop free energy...
    Go to contribution page
  4. 9. Investigating formation condition of primordial black holes for generalized initial perturbation profiles
    Mr Tomohiro Nakama (Research Center for the Early Universe, the University of Tokyo)
    11/14/13, 9:45 AM
    Cosmology
    oral
    If the amplitude of the density perturbation is sufficiently large in some region in the early universe dominated by radiation, this region starts to contract against pressure gradients after the horizon reently and collapses to form a black hole (Primordial Black Hole, PBH). In order to analyze formation process of these PBHs, in our previous paper we developed an asymptotic expansion...
    Go to contribution page
Building timetable...