The 4th UniverseNet School - Frontiers of Particle Cosmology

Session

6 talks (Chair: Athanasios LAHANAS)

13 Sept 2010, 14:30

Lecce, Università del Salento

4. Mr. MCCULLOUGH, Matthew (University of Oxford): The Goldstini Variations

13/09/2010, 14:30

46. Mr. PAPPAS, Nikolaos (University of Ioannina): Emission of Massive Scalar Fields by a Higher-Dimensional Rotating Black-Hole

13/09/2010, 14:45

We perform a comprehensive study of the emission of massive scalar fields by a higherdimensional, simply rotating black hole both in the bulk and on the brane. We derive approximate, analytic results as well as exact numerical ones for the absorption probability, and demonstrate that the two sets agree very well in the low and intermediate-energy regime for scalar fields with mass m 1 TeV in...

5. Mr. NO, Jose Miguel Postdoc (CEA Saclay): Bubble growth and energy budget in cosmological first order phase transitions

13/09/2010, 15:00

A cosmological first order phase transition can lead to many interesting phenomena, such as electroweak baryogenesis, primordial magnetic fields, or the production of a stochastic background of gravitational waves. All of them rely on the phase transition proceeding through the nucleation and subsequent expansion of bubbles, and apart from the quantities that describe the phase transition...

6. Dr. SMITH, Christel (Arizona State University): Investigating the Synthesis of the Primordial Lithium Isotopes with New Nuclear and Neutrino Physics

13/09/2010, 15:15

The discrepancy between the primordial 7Li predicted abundance and the observed abundance in metal poor halo stars has been a longstanding problem. This problem may in fact be coupled with recent observational suggestions that there could be 2-3 orders of magnitude more 6Li than Big Bang Nucleosynthesis (BBN) calculations predict. We explore these issues by developing a more comprehensive...

7. Ms. SOKOLOWSKA, Dorota (ITP Warsaw) Inert Model and the evolution of the Universe

13/09/2010, 15:30

We consider evolution of the Universe after EWSB leading to the present Inert phase, containing a SM-like Higgs boson and scalar dark particles among them a Dark Matter candidate. In particular we address the question, if there is a possibility to have a sequence of the phase transitions instead of a single one leading directly from EW symmeric phase to the Inert one.

8. Mr. VARDANYAN, Mihran (University of Oxford): How big is the Universe?

13/09/2010, 15:45

One of the most important questions of cosmology is to determine whether the Universe is spatially finite or infinite. We use Bayesian model averaging to derive new constraints on the minimum size of the Universe. Our procedure accounts for the model uncertainty between the three different possibilities for the geometry of the Universe in the context of a Friedmann-Robertson-Walker metric...