Speaker
Dr
Jordi Salvado
(Wisconsin IceCube Particle Astrophysics Center (WIPAC) and Department of Physics University of Wisconsin, Madison)
Description
Recent cosmological measurements favors additional relativistic energy
density beyond the one provided by the three active neutrinos and
photons of the Standard Model(SM), suggesting the need of new light
states in the theory beyond those of the SM. Another alternative is
that this increase comes from the decay of some new form of heavy
matter into the SM neutrinos. In this talk I will present the results
of the cosmological data analysis for the second possibility studying
the decaying matter density and it's lifetime using data from the
Wilkinson Microwave Anisotropy Probe, the South Pole Telescope,
measurements of the Hubble constant at present time, the results from
high-redshift Type-I supernovae, the information on the Baryon
Acoustic Oscillation scale, and the constraint on the expansion rate
from Big Bang Nucleosynthesis.
| APS member ID | 61150809 |
|---|
Primary author
Dr
Jordi Salvado
(Wisconsin IceCube Particle Astrophysics Center (WIPAC) and Department of Physics University of Wisconsin, Madison)
