Speaker
Dr
Sarira Sahu
(Instituto de Ciencias Nucleares, UNAM)
Description
It is believed that choked gamma-ray bursts (CGRBs) are the potential candidates for the production of high energy neutrinos in GeV-TeV energy range. These CGRBs out number the successful GRBs by many orders. So it is important to observe neutrinos
from these cosmological objects with the presently operating neutrino telescope IceCube. We study the three flavor neutrino oscillation of these high energy neutrinos in the presupernova star environment which is responsible for the CGRB. For the presupernova star we consider three different models and calculate the neutrino oscillation probabilities, as well as neutrino flux on the surface of these star. The matter effect modifies the neutrino flux of different flavors on the surface of the star. We have also calculated the flux of these high energy neutrinos on the surface of the Earth. We found that for neutrino energies below about 10 TeV the flux ratio does not amount to 1:1:1, whereas for higher energy neutrinos it does.
Primary author
Dr
Sarira Sahu
(Instituto de Ciencias Nucleares, UNAM)
Co-authors
Dr
Andres Osorio Oliveros
(Universidad de Los Andes, Bogota, Colombia)
Dr
Juan Carlos Sanabria
(Universidad de Los Andes, Bogota, Colombia)