A new minimal neutrino mass matrix texture is introduced that enforces equal Majorana phases within a partial TBM scheme and is realized via hybrid Type-I and Type-II seesaw under an extended discrete symmetry.
Indications of Neutrino Oscillation in a 250 km Long-baseline Experiment
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abstract
The K2K experiment observes indications of neutrino oscillation: a reduction of $\nu_\mu$ flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are observed in Super-Kamiokande (SK), 250 km from the neutrino production point, with an expectation of $80.1^{+6.2}_{-5.4}$. Twenty-nine one ring $\mu$-like events are used to reconstruct the neutrino energy spectrum, which is better matched to the expected spectrum with neutrino oscillation than without. The probability that the observed flux at SK is explained by statistical fluctuation without neutrino oscillation is less than 1%.
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Equal Majorana Phases from a Minimal and Predictive Neutrino Texture
A new minimal neutrino mass matrix texture is introduced that enforces equal Majorana phases within a partial TBM scheme and is realized via hybrid Type-I and Type-II seesaw under an extended discrete symmetry.