1. Home
  2. Abstract – Publication

Abstract – Publication

Searching for pseudo-dirac neutrinos from astrophysical sources in IceCube data.
DIXIT, Khushboo; PALACIOS, Luis Salvador Miranda; RAZZAQUE, Soebur.
Abstract: We analyze IceCube public data from its IC86 configuration, namely PSTracks event selection, to search for pseudo-Dirac signatures in high-energy neutrinos from astrophysical sources. Neutrino flux from astrophysical sources is reduced in the pseudo-Dirac scenario due to the 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 four point-like sources in both scenarios and constrain the active-sterile mass-square-difference in the absence of any evidence for the pseudo-Dirac scenario. We present the exclusion regions for the common mass-squared difference dm2, inducing active-sterile oscillations, for all three neutrino flavors. This includes results from individual sources as well as from a stacking analysis that combines data from the four sources. Our findings indicate that the exclusion region is dm2 E [2.1×10-21 -2.0×10-16] eV2 with = 90% confidence level (CL) significance for neutrino energies ranging from 0.5 TeV to 1 PeV.When we extend the energy range down to 0.1 TeV, the exclusion region broadens to dm2 E [1.1 × 10-21 - 3.0 × 10-16] eV2 at = 90% CL.
European Physical Journal C
v. 85, n. 12, p. 1481-1-1481-17 - Ano: 2025
Fator de Impacto: 4,8
    @article={003284925,author = {DIXIT, Khushboo; PALACIOS, Luis Salvador Miranda; RAZZAQUE, Soebur.},title={Searching for pseudo-dirac neutrinos from astrophysical sources in IceCube data},journal={European Physical Journal C},note={v. 85, n. 12, p. 1481-1-1481-17},year={2025}}