Venue: AULA SEMINARIO, Physical Department of the University of Buenos Aires (DF-UBA), Pabellón I, Ciudad Universitaria -C.A.B.A- Argentina.
Program:
10.00-11.00 Esteban Calzetta (IFIBA-UBA)
Title: Real fluids in cosmology
Abstract: Recent advances in heavy ion collisions have revived the interest in developing a theory of the behavior of relativistic fluid behavior at timescales that are not large with respect to the relaxation times of microscopic dynamics, and therefore in a regime where there are significant deviations with respect to an ideal fluid. However, the usual way in which one incorporates non-ideal behavior into non-relativistic fluids (ie, the Navier-Stokes equation) is not adequate in the relativistic regime.
This raises, on the one hand, a formal problem, that is, which is the correct way to introduce non-ideal behavior in the relativistic dynamics of fluids, and on the other hand, the study of what the observable consequences of such behavior would be in the appropriate contexts. In this talk we will describe the developments we have made to build a relativistic theory of real fluids and the tests of the theory we have done in simplified models, and also a possible observational consequence from the interaction between a real fluid and gravitational waves in the Early Universe.
11.00-11.30 Coffe
11.30-12.30 Osvaldo Civitarese (IFLP-UNLP)
Title: On neutrinos and their properties
Abstract: Neutrinos are essential components of the constitutive models of matter and their interactions. In this presentation we will discuss the current state of knowledge of the properties of neutrinos, in order to provide information (oscillation parameters, mass limits and their hierarchies) that may be useful in applications to cosmology. In particular we will present some results regarding effects associated with renormalizations of the axial-vector current and the leptonic flavor violation.
12.30-14.30 Lunch
14.30-15.30 Claudia Scóccola (FCAG-UNLP)
Title: QUBIC - The QU Bolometric Interferometer for Cosmology
Abstract: One of the major challenges of modern cosmology is the detection of B-mode polarization anisotropies in the Cosmic Microwave Background. These originates from tensor fluctuations of the metric produced during the inflationary phase. The expected level of these anisotropies is however so small that it requires a new generation of instruments with high sensitivity and extremely good control of systematic effects.The QUBIC instrument based on the novel concept of bolometric interferometry brings together the sensitivity advantages of bolometric detectors with the advantages of control of systematics of interferometry. In this talk I review the concept of the QUBIC instrument to be installed in Salta, and the possibilities it offers.
16.00-17.00 Nicolás Grandi (IFLP-UNLP)
Title: From dark matter to dark metal: fermionic halos in AdS/CFT
Abstract: It is known from astrophysical research, that when a large number of self graviting fermions are in equilibrium at finite temperature, their density profile develops a "dense core / diluted halo" structure. I this talk, I will explore the consequence of such behavior in the holographic setup, when the asymptotics corresponds to that of an AdS space.