Magnetized Iron Calorimeter Detector Research Articles

Probing CPT violation in neutrino oscillation: A three flavor analysis

We have studied CPT violation in neutrino oscillation considering three flavor framework with matter effect. We have constructed a new way to find the oscillation probability incorporating CPT violating terms without any approximation. Then CPT violation with atmospheric neutrinos for a magnetized iron calorimeter detector considering the muons (directly measurable with high resolution) of the charge current events has been studied for zero and nonzero θ 13 values. It is found that a potential bound of δ b 32 ≲ 6 × 10 − 24 GeV at 99% CL can be obtained with 1 Mton.year exposure of this detector; and unlike neutrino beam experiments, there is no possibility to generate ‘fake’ CPT violation due to matter effect with atmospheric neutrinos. The advantages of atmospheric neutrinos to discriminate CPT violation from CP violation and nonstandard interactions are also discussed.

Discrimination of the mass hierarchy with atmospheric neutrinos at a magnetized muon detector

We have studied the mass hierarchy with atmospheric neutrinos considering the muon energy and zenith angle of the event at the magnetized iron calorimeter detector. For ${\ensuremath{\chi}}^{2}$ analysis we have migrated the number of events from neutrino energy and zenith angle bins to muon energy and zenith angle bins using the two-dimensional energy-angle correlated resolution functions. Then the ${\ensuremath{\chi}}^{2}$ is marginalized considering all possible systematic uncertainties of the atmospheric neutrino flux and cross section. The effects of the ranges of oscillation parameters on the marginalization are also studied. The lower limit of the range of ${\ensuremath{\theta}}_{13}$ for marginalization is found to be very crucial in determining the sensitivity of hierarchy for a given ${\ensuremath{\theta}}_{13}$. Finally, we show that one can discriminate atmospheric neutrino mass hierarchy at $>90%$ C.L. if the lower limit of ${\ensuremath{\theta}}_{13}\ensuremath{\ge}5\ifmmode^\circ\else\textdegree\fi{}$.

Prospects of measuring the leptonicCPphase with atmospheric neutrinos

We have studied the prospects of measuring the $CP$ violating phase with atmospheric neutrinos at a large magnetized iron calorimeter detector considering the muons (directly measurable) of the neutrino events generated by a Monte Carlo event generator Nuance. The effect of ${\ensuremath{\theta}}_{13}$ and ${\ensuremath{\delta}}_{CP}$ appears dominantly neither in atmospheric neutrino oscillation nor in solar neutrino oscillation, but appears as subleading in both cases. These are observable in the range of $E\ensuremath{\sim}1\text{ }\text{ }\mathrm{GeV}$ for atmospheric neutrino, where solar and atmospheric oscillation couple. In this regime, the quasielastic events dominate and the energy resolution is very good, but the angular resolution is very poor. Unlike beam experiments this poor angular resolution acts against its measurements. However, we find that one can be able to distinguish ${\ensuremath{\delta}}_{CP}\ensuremath{\approx}0\ifmmode^\circ\else\textdegree\fi{}$ and 180\ifmmode^\circ\else\textdegree\fi{} at 90% confidence level. We find no significant sensitivity for ${\ensuremath{\delta}}_{CP}\ensuremath{\approx}90\ifmmode^\circ\else\textdegree\fi{}$ or 270\ifmmode^\circ\else\textdegree\fi{}.

Physics potentials of a magnetized iron calorimeter detector

We discuss the possibilities of improving the precision of atmospheric neutrino oscillation parameters Δm231 and sin2 θ23, determining the sign of Δm231 and the octant of θ23 using atmospheric neutrinos in a magnetized iron calorimeter detector.

Exploration prospects of a long baseline beta beam neutrino experiment with an iron calorimeter detector

A high intensity source of a single neutrino flavour with known spectrum is most desirable for precision measurements, the consensus direction for the future. The beta beam is an especially suitable option for this. We discuss the prospects of a very long baseline beta beam experiment with a magnetized iron calorimeter detector. In particular, with the source at CERN and the detector at the proposed India-based Neutrino Observatory (INO) the baseline is near the ‘magic’ value where the effect of the CP phase is small. We observe that this experiment will be well suited to determine the sign of m32−m22 and will be capable of probing θ13 down to about 1°.