Description
Chair: Masahiro Kawasaki (ICRR)
Dr
Raghavan Rangarajan
(Physical Research Laboratory, India)
11/13/13, 2:20 PM
Cosmology
oral
Recently there have been differing viewpoints on how to evaluate the
curvature power spectrum generated during inflation. In a series of
papers by Parker and collaborators it has been argued that the renormalization scheme adopted for the inflaton field phi(x) to make <phi^2(x)> finite should also be applied to |phi_k|^2. But this then modifies the curvature power spectrum in a non-trivial...
Ms
Junko Ohashi
(Tokyo University of Science)
11/13/13, 2:45 PM
Cosmology
oral
We study observational signatures of two classes of anisotropic
inflationary models in which an inflaton field couples to
(i) a vector kinetic term $F_{¥mu ¥nu}F^{¥mu ¥nu}$ and
(ii) a two-form kinetic term $H_{¥mu ¥nu ¥lambda}H^{¥mu ¥nu ¥lambda}$.
We compute the corrections from the anisotropic sources to the
power spectrum of gravitational waves as well as the two-point
cross...
Mr
Tomohiro Fujita
(Kavli IPMU/Tokyo Univ.)
11/13/13, 3:10 PM
Cosmology
oral
In 2010, it was first reported that weak and large scale magnetic fields (MFs) were observed in void regions. These void MFs may share their origin with galactic/galaxy cluster MFs in primordial MFs. Thus a theoretical research on the generation of primordial MFs is now strongly motivated.
I seek the possibility that primordial MFs is produced during inflation and find
not only several...
Dr
Sean Downes
(Leung Center for Cosmology and Particle Astrophysics)
11/13/13, 3:35 PM
Cosmology
oral
This year the Planck Collaboration has ruled out many models of inflation that would have informed us of new physics. The models which survived the data release are fairly close to vanilla: single-field inflation with a nearly Gaussian, slightly redshifted spectrum. Well-studied scenarios in the string inflation context include inflection point inflation and the Starobinsky-like models.
We...
