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This is a Quantitative Study study.

October 10, 2025Open Access

Neutrino Oscillation and CPT Violation: A Four Flavour Matter Effects

BKBipin Singh KorangaUniversity of Delhi SRSeema RawatUniversity of Delhi

Key Points

CPT violation was examined in the four flavour neutrino framework, emphasizing matter effects.
Results indicate upper bounds for CPT violation with specific mass square discrepancies calculated.
Analysis incorporates matter density profiles affecting four flavour neutrino oscillation.
Findings may advance understanding of fundamental particle behavior in neutrino physics.

Abstract

In a matter for the four flavour neutrino oscillation (3+1) scheme, the CPT violation is taken into consideration. Assuming that the mismatch between neutrino and anti-neutrino mass square discrepancies causes the CPT to be violated in matter. We suppose that the presence of matter causes the four flavour neutrino and anti-neutrino mass differences to square. For four flavour neutrino oscillation, we take into account the pertinent matter density profile. In this study, we calculate the upper bound constraint of the CPT violation in matter for a four flavour scheme. |Δm/21−Δm/21|=(1.21−3.44)×10−3)eV2,|Δm/31−Δm/31|=(1.68−6.41)×10−4)eV2 and |Δm/41−Δm/41|=(1.06−4.60)×10−5)eV2 In this paper, we examine the CPT violation in a framework with four flavours in matter.

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