Chair: I. Gil Botella
Daniele Montanino (Università del Salento & INFN, Lecce)
Recently it has been pointed out that a cosmic background of relativistic axion-like particles (ALPs) would be produced by the primordial decays of heavy fields(moduli) in the post-inflation epoch, contributing to the extra-radiation content in the Universe today. Primordial magnetic fields would trigger conversions of these ALPs into sub-MeV photons during the dark ages. This photon flux...
Alessandro Mirizzi (Bari Univ & INFN Bari)
In this talk I will present an update of the axion bounds from a supernova explision based on the state-of-the art simulations. I will update the bound of photon-axion coupling from the non-observation of gamma-rays in coindicende with the SN 1987A. I will discuss the perspective of improvement in the case of observation of a future supernova with Fermi-LAT satellite. I will also revisit the...
Annika Reinert (Bethe Center for Theoretical Physics, Universität Bonn)
One aim of cosmic ray measurements is to search for possible signatures of annihilating or decaying dark matter. The excess of positrons measured at the top of the atmosphere has attracted a lot of attention in this context. On the other hand it has been proposed that the data might challenge the established diffusion model for cosmic ray propagation. We investigate a modification of the...
Olga Czerwińska (Univ Warsaw)
Time-dependent masses or background fields may induce abundant production of particles. The talk shall describe this process in detail with the impact of the rescattering emphasized, also in models with more than a single coupling constant. Cosmological applications of the general method and comparison between perturbative and non-perturbative results shall be presented.
Emre Kahya (Technical University Istanbul)
I will discuss quantum gravitational loop effects to observable quantities such as curvature power spectrum and primordial non-gaussianity of Cosmic Microwave Background (CMB) radiation. We first review the previously shown case where one gets a time dependence for zeta-zeta correlator due to loop corrections. Then we investigate the effect of these loop corrections to primordial...
Carla Biggio (Univ Genova)
The measured value of the muon anomalous magnetic moment shows a discrepancy from the Standard Model prediction. In this talk we assume that this discrepancy can be explained by adding a single new particle to the Standard Model field content and we show which are the cases in which this could indeed work.