Dr
Mitsuru Kakizaki
(Physics Institute, Bonn University)

7/27/07, 4:30 PM

Cosmology and Astrophysics

Parallel Talk

We investigate the relic density n_\chi of non-relativistic long-lived or stable
particles \chi in non-standard cosmological scenarios. We calculate the relic
abundance starting from arbitrary initial temperatures of the radiation-
dominated epoch, and derive the lower bound on the initial temperature T_0
\geq m_\chi/23, assuming that thermally produced \chi particles account for the...

Pearl Sandick
(University of Minnesota)

7/27/07, 4:50 PM

Cosmology and Astrophysics

Parallel Talk

We study models in which supersymmetry breaking appears at an intermediate
scale, M_{in}, below the GUT scale. We assume that the soft
supersymmetry-breaking parameters of the MSSM are universal at M_{in}, and
study the morphology of the constraints from cosmology and collider
experiments on the allowed regions of parameter space as M_{in} is reduced from
the GUT scale. We present...

Dr
Stefano Scopel
(Korea Institute of Advanced Study, Seoul)

7/27/07, 5:10 PM

Cosmology and Astrophysics

Parallel Talk

We discuss the lower bound to the lightest Higgs boson H_1 in the minimal
supersymmetric extension of the standard model with explicit CP violation, and the
phenomenology of the lightest relic neutralino in the same scenario. We find that the
combination of present experimental constraints favours a region of the parameter
space where the mass of H_1 is in the range 7 GeV < M_{H_1} < 10...

Lorenzo Calibbi
(Universitat de Valencia)

7/27/07, 5:30 PM

Cosmology and Astrophysics

Parallel Talk

We will consider a SUSY-$SU(5)$ with one right-handed neutrino with
a large top like Yukawa coupling. Assuming universal soft masses at
high scale we compute the low-energy spectrum and subsequently
the neutralino LSP relic density taking also into consideration
$SU(5)$ as well as the see-saw running effects above the gauge coupling
unification scale. We found that there exists no...

Mr
Björn Herrmann
(LPSC Grenoble)

7/27/07, 5:50 PM

Cosmology and Astrophysics

Parallel Talk

Supersymmetry (SUSY) is the most economical and best studied possible extension of
the Standard Model of particle physics. In particular, the lightest of the four
neutralinos is a good candidate for the cold dark matter, which accounts for about
25% of our universe and whose nature remains at present unknown. The possibility to
compute the neutralino relic density within a given model and...

Prof.
Myriam Mondragon
(Instituto de Fisica, UNAM, Mexico)

7/27/07, 6:10 PM

Cosmology and Astrophysics

Parallel Talk

We derive an expression for the entropy of a present dark matter halo
described by the Navarro-Frenk-White model and a core. The comparison
of this entropy with the one of the halo at the freeze-out era allows
us to constrain the parameter space in mSUGRA models,
when used with the WMAP observations.
Moreover, by joning these results with the ones
obtained from the usual abundance...