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How do neutrino/cosmic features can affect cosmic/neutrino properties?

Alex Bernardini - Universidade Federal de São Carlos, Brasil

What CFP Seminar
When 2013-03-15
from 14:30 to 15:30
Where Room -117
Contact Name Joao Penedones
Contact Email jpenedones@gmail.com
Who Alex Bernardini
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We shall begin our presentation with a resumed overview of the fundamental neutrino properties followed by brief description of the state of art of flavor oscillation "effective" models. Our subsequent discussion is mainly concerned with the role of the cosmological neutrino background (CνB) in the thermal history of the Universe and with its rapport to the cosmic inventory. By introducing some analytical manipulation tricks we show how the inclusion of the CνB component into the cosmological perturbation theory affects the predictions for the matter power spectra P(k) and, in a secondary way, for the tensorial contribution to the cosmic microwave background (CMB) anisotropy. Likewise, through some basic elements of the quantum measurement theory, we verify how CνB energy density (indirect) measurements are (more accurately) related to neutrino mass formulas and to predictions for the neutrino background temperature. To end up, several theoretical issues relating cosmological neutrinos to CMB, dark matter and dark energy are drawn.