Descripción
Chair: D. Montanino
Danny Marfatia
(University of Hawaii)
24/5/16 11:30
Astro/Cosmo/Neutrinos
Contributed talk
We analyze the energy and zenith angle distributions of the latest 2-year IceCube dataset of upward going atmospheric neutrinos to constrain sterile neutrinos at the eV scale in the 3+1 scenario. We find that the parameters favored by a combination of LSND and MiniBooNE data are excluded at about the 99% C.L. We explore the impact of nonstandard matter interactions on this exclusion, and find...
Boris Panes
(Instituto de Fisica, Univ Sao Paulo)
24/5/16 11:50
Astro/Cosmo/Neutrinos
Contributed talk
In order to exploit the potential of IceCube, it is advisable to interpret
as consistently as possible their experimental results. Here, we study the consequences of considering that the fraction of neutrinos and anti-neutrinos produced by a particular source are not necessarily the same. Like for example, when the source of neutrinos is mostly due to cosmic rays photo-disintegration. Also,...
M. Angeles PEREZ-GARCIA
(Univ Salamanca)
24/5/16 12:10
Astro/Cosmo/Neutrinos
Contributed talk
We discuss the production of a class of heavy sterile neutrinos νh in proto-neutron stars. The neutrinos, of mass around 50 MeV, have a negligible mixing with the active species but relatively large dimension-5 electromagnetic couplings. In particular, a magnetic dipole moment μ ≈10−6 GeV^{−1}implies that they are thermally produced through e+e−→¯νh νh in the early phase of the core collapse,...
Jacobo Lopez Pavon
(INFN Sezione di Genova)
24/5/16 12:30
Astro/Cosmo/Neutrinos
Contributed talk
We derive constraints on the mixing of heavy Seesaw neutrinos with the SM fields. We explore and compare both a completely general scenario where the heavy neutrinos are integrated out (without any further assumption) and the more constrained case with only 3 extra heavy states. The latter assumption implies non-trivial correlations that do not allow to saturate all model-independent bounds....
Mehran Zahiri Abyaneh
(IFIC, CSIC-Univ Valencia)
24/5/16 12:50
Astro/Cosmo/Neutrinos
Contributed talk
The origin of small mixing among the quarks and a large mixing among the neutrinos has been an open question in particle physics. In order to answer this question, we postulate general relations among the quarks and the leptonic mixing angles at a high scale, which could be the scale of Grand Unified Theories. The central idea of these relations is that the quark and the leptonic mixing angles...
