Jul 17 – 24, 2024
Prague
Europe/Prague timezone

Searching for signatures of Pseudo-Dirac neutrinos in IceCube data from Astrophysical sources

Jul 19, 2024, 12:00 PM
15m
South Hall 2B

South Hall 2B

Parallel session talk 08. Astro-particle Physics and Cosmology Astro-particle Physics and Cosmology

Speaker

Dr Khushboo Dixit (Centre for Astro-Particle Physics, University of Johannesburg)

Description

We will present an analysis of IceCube public data from its IC86configuration, namely PSTracks event selection, to search for pseudo-Dirac signatures in high-energy neutrinos from astrophysical sources NGC 1068, TXS 0506+056, PKS 1424+240 and GB6 1542+6129which have been detected with high significance. Neutrino flux from astrophysical sources is reduced in the pseudo-Dirac scenario due to conversion of active-to-sterile neutrinos as compared to the neutrino oscillation scenario of only three active neutrinos over astrophysical distances. We fit IceCube data using astrophysical flux models for these sources in both scenarios and constrain the active-sterile mass-square-difference through a stacking analysis. We also predict ratios of astrophysical neutrinos of different flavors from these sources in the pseudo-Dirac scenario that can be probed in future neutrino detectors such as KM3NeT and IceCube Gen-2.

Alternate track 02. Neutrino Physics
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Primary author

Co-authors

Luis Salvador Miranda Palacios (The Chinese University of Hong Kong) Dr Khushboo Dixit (Centre for Astro-Particle Physics, University of Johannesburg)

Presentation materials