3 research outputs found
On Neutrinos and Fermionic Mass Patterns
Recent data on neutrino mass differences are consistent with a hierarchical
neutrino mass structure strikingly similar to what is observed for the other
fermionic masses.Comment: 8pages, 2figure
Search for n-nbar oscillation in Super-Kamiokande
A search for neutron-antineutron () oscillation was undertaken in
Super-Kamiokande using the 1489 live-day or neutron-year
exposure data. This process violates both baryon and baryon minus lepton
numbers by an absolute value of two units and is predicted by a large class of
hypothetical models where the seesaw mechanism is incorporated to explain the
observed tiny neutrino masses and the matter-antimatter asymmetry in the
Universe. No evidence for oscillation was found, the lower limit of
the lifetime for neutrons bound in O, in an analysis that included all
of the significant sources of experimental uncertainties, was determined to be
~years at the 90\% confidence level. The corresponding
lower limit for the oscillation time of free neutrons was calculated to be ~s using a theoretical value of the nuclear suppression factor of
~s and its uncertainty.Comment: 8 pages, 2 figure
Search for n-nbar oscillation in Super-Kamiokande
A search for neutron-antineutron () oscillation was undertaken in
Super-Kamiokande using the 1489 live-day or neutron-year
exposure data. This process violates both baryon and baryon minus lepton
numbers by an absolute value of two units and is predicted by a large class of
hypothetical models where the seesaw mechanism is incorporated to explain the
observed tiny neutrino masses and the matter-antimatter asymmetry in the
Universe. No evidence for oscillation was found, the lower limit of
the lifetime for neutrons bound in O, in an analysis that included all
of the significant sources of experimental uncertainties, was determined to be
~years at the 90\% confidence level. The corresponding
lower limit for the oscillation time of free neutrons was calculated to be ~s using a theoretical value of the nuclear suppression factor of
~s and its uncertainty.Comment: 8 pages, 2 figure