Day III

Venue: ICAS Seminar Room

Program:

Friday 12 de octubre:

10.00AM Welcome Coffee

10.30AM Diego Harari: "Polarization of the Cosmic Microwave Background and the QUBIC project"

11.30AM Coffe Break & Discussion

12.00PM Matías Zaldarriaga: Challenges for physical cosmology after Planck

01.00PM Lunch & Discussion (In situ Chori- & Vaci-pan, many whiteboards)

02.30PM Esteban Roulet: "Distincion entre neutrinos de Dirac y de Majorana usando el fondo cosmico de neutrinos"

03.30PM Coffe Break & Discussion

04.00PM Rogerio Rosenfeld: If the Universe is the answer what is the question?

05.00PM Aperitif

Diego Harari:

Polarization of the Cosmic Microwave Background and the QUBIC project

Inflationary cosmological models predict the existence of primordial gravitational waves. These imprint a characteristic

pattern upon the polarization of the cosmic microwave background. Several experimental efforts are underway to

measure this pattern, that would reveal signs of new physics in the early Universe. Detection is challenging,

because of the extreme sensitivity required and the need to discriminate the cosmological signal from polarized

foregrounds. We will review the predictions of inflationary cosmology, the method used to disentangle

polarization imprinted by gravitational waves from that produced by density fluctuations, and the current status of observations. We will also describe the QUBIC project, the first CMB experiment planned to be installed in Argentina, near San Antonio de los Cobres, Salta.

---

Matías Zaldarriaga:

Challenges for physical cosmology after Planck

---

Esteban Roulet:

On the distinction of Dirac and Majorana neutrinos using the Neutrinos Cosmic Background

I will discuss why the capture of cosmic neutrinos with radioactive beta nuclei depends on whether these are Dirac or Majorana fermions, and how this depends on the value of the masses and the type of hierarchy, and on what would be necessary to observe these effects.

---

Rogerio Rosenfeld:

If the Universe is the answer what is the question?

The question is: what is the best model that describes our Universe?

I'll describe recent attempts to address this question using the data collected by the Dark Energy Survey during its first year of activity.