RICAP-13 Roma International Conference on AstroParticle Physics

Session

Parallel Session A

22 May 2013, 14:00

Physics Department, University "La Sapienza", Roma, Italy

Conveners

Parallel Session A

• Paolo Lipari (ROMA1)

58. Constraints on the Galactic Halo Dark Matter from Fermi-LAT Diffuse Measurements

Dr Alessandro cuoco (University of Torino)

22/05/2013, 14:00

I will discuss constraints on dark matter annihilating or decaying in the Milky Way Halo from observations of the diffuse gamma-ray emission with the Fermi Large Area Telescope. A novel approach is developed to take into account the astrophysical foregrounds, with the use of the GALPROP code to model the foreground astrophysical diffuse emission and a profile likelihood formalism to...

55. Diffuse gamma-rays from Misaligned AGN and constraints on galactic Dark Matter

Dr Fiorenza Donato (Torino University)

22/05/2013, 14:20

We calculate the diffuse gamma-ray emission due to the population of misaligned AGN (MAGN) unresolved by the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope. We demonstrate that the MAGN can contribute from 10% up to nearly the entire measured Isotropic Gamma-Ray Background (IGRB), with a theoretical uncertainty on the flux of almost an order of magnitude. We also evaluate...

40. High and low energy puzzles in the AMS-02 positron fraction results

Dario Grasso (PI)

22/05/2013, 14:40

AMS-02 recently measured the cosmic ray positron fraction (PF) with unprecedented accuracy in a wider energy range (0.5 - 350 GeV) than PAMELA and Fermi-LAT did. Above few hundred GeV the electron and positron spectra are expected to be significantly affected by the spatial distribution of sources. For this reason we model, for the first time, their propagation by means of a 3-dimensional...

39. Perspectives of dark matter searches with antideuterons

Andrea Vittino (T)

22/05/2013, 15:00

The search for an excess of antideuterons in the cosmic rays flux has been proposed as a very promising channel for dark matter indirect detection, especially for WIMPs with a low or intermediate mass. With the development of the AMS experiment and the proposal of a future dedicated experiment, i.e. the General Antiparticle Spectrometer (GAPS), there are exciting possibilities for a dark...

69. Dark Matter implications of Fermi-LAT measurement of anisotropies in the diffuse gamma-ray background

Mr German Arturo Gomez Vargas (Universidad Autonoma de Madrid - IFT UAM/CSIC)

22/05/2013, 15:20

The detailed origin of the diffuse gamma-ray background is still unknown. However, the contribution of unresolved sources is expected to induce small-scale anisotropies in this emission, which may provide a way to identify and constrain the properties of its contributors. Recent studies have predicted the contributions to the angular power spectrum (APS) from extragalactic and galactic dark...

72. Cosmological and astrophysical constraints on majoron dark matter

Dr Massimiliano Lattanzi (Università di Ferrara)

22/05/2013, 15:40

In my talk I will explore the possibility that the dark matter is related to the origin of neutrino masses. In fact, neutrino masses could arise from spontaneous breaking of ungauged lepton number and the resulting Goldstone boson, the majoron, may pick up a mass due to gravity and play the role of dark matter. I will first examine the cosmological constraints on the majoron density and...