scholarly journals A three generation oscillation analysis of the Super-Kamiokande atmospheric neutrino data beyond one mass scale dominance approximation

2002 ◽  
Vol 17 (1) ◽  
pp. 51-73 ◽  
Author(s):  
Sandhya Choubey ◽  
Srubabati Goswami ◽  
Kamales Kar
Keyword(s):  
Atmospheric Neutrino ◽  
Mass Scale ◽  
Oscillation Analysis

scholarly journals Accelerator, Reactor and Atmospheric Neutrino Data: A Three-Flavor Oscillation Analysis

1997 ◽  
Vol 12 (04) ◽  
pp. 781-799 ◽  
Author(s):  
Srubabati Goswami ◽  
Amitava Raychaudhuri ◽  
Kamales Kar
Keyword(s):  
Experimental Data ◽  
Narrow Range ◽  
Atmospheric Neutrino ◽  
Mass Scale ◽  
Atmospheric Neutrinos ◽  
Mixing Angles ◽  
Oscillation Analysis ◽  
Reactor Neutrinos ◽  
Flavor Oscillation ◽  
Interesting Solution

We perform a three-flavor oscillation analysis of accelerator, reactor and atmospheric neutrino results. Motivated by the experimental data, the mass squared differences are chosen to be Δ12 = Δ13 in the range 0.5–10 eV2 and Δ23 = 10-2 eV2. In such a scenario, the oscillation probabilities for the accelerator and reactor neutrinos involve only two of the mixing angles and one mass scale. But the atmospheric neutrino oscillation is governed by both mass scales and all the three mixing angles. The greater latitude allowed by the scheme leads to some new and interesting solution regions for atmospheric neutrinos in addition to the two-flavor limits usually discussed. However, incorporating the constraints from the previous accelerator searches for neutrino oscillations, a very narrow range of allowed mixing angles survives. This zone is beyond the reach of the on-going accelerator experiments CHORUS and NOMAD with their projected sensitivity.

RECENT RESULTS FROM K2K

2002 ◽  
Vol 17 (24) ◽  
pp. 3364-3377 ◽  
Author(s):  
◽  
C. K. JUNG
Keyword(s):  
Neutrino Oscillation ◽  
Atmospheric Neutrino ◽  
Neutrino Beam ◽  
Statistical Fluctuation ◽  
Atmospheric Neutrinos ◽  
Long Baseline ◽  
Neutrino Oscillation Experiment ◽  
Oscillation Analysis ◽  
The Us ◽  
Oscillation Experiment

K2K is a long baseline neutrino oscillation experiment using a neutrino beam produced at the KEK 12 GeV PS, a near detector complex at KEK and a far detector (Super-Kamiokande) in Kamioka, Japan. The experiment was constructed and is being operated by an international consortium of institutions from Japan, Korea, and the US. The experiment started taking data in 1999 and has successfully taken data for about two years. K2K is the first long beseline neutrino oscillation experiment with a baseline of order hundreds of km and is the first accelerator based neutrino oscillation experiment that is sensitive to the Super-Kamiokande allowed region obtained from the atmospheric neutrino oscillation analysis. A total of 44 events have been observed in the far detector during the period of June 1999 to April 2001 corresponding to 3.85 × 1019 protons on target. The observation is consistent with the neutrino oscillation expectations based on the oscillation parameters derived from the atmospheric neutrinos, and the probability that this is a statistical fluctuation of non-oscillation expectation of [Formula: see text] is less than 3%.

scholarly journals Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV

2018 ◽  
Vol 97 (7) ◽  
Author(s):  
K. Abe ◽  
C. Bronner ◽  
Y. Haga ◽  
Y. Hayato ◽  
M. Ikeda ◽  
...  
Keyword(s):  
Neutrino Oscillation ◽  
Atmospheric Neutrino ◽  
External Constraints ◽  
Oscillation Analysis

scholarly journals Atmospheric neutrino oscillation analysis with subleading effects in Super-Kamiokande I, II, and III

2010 ◽  
Vol 81 (9) ◽  
Author(s):  
R. Wendell ◽  
C. Ishihara ◽  
K. Abe ◽  
Y. Hayato ◽  
T. Iida ◽  
...  
Keyword(s):  
Neutrino Oscillation ◽  
Atmospheric Neutrino ◽  
Oscillation Analysis

scholarly journals ANALYTICAL CALCULATION OF MATTER EFFECTS IN TWO MASS-SCALE NEUTRINO OSCILLATIONS

2003 ◽  
Vol 18 (08) ◽  
pp. 569-578 ◽  
Author(s):  
MOHAN NARAYAN ◽  
S. UMA SANKAR
Keyword(s):  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
Analytical Calculation ◽  
Mass Scale ◽  
Numerical Investigations ◽  
Matter Effects

We consider three active flavor neutrino oscillations where both the mass-square differences play a role in atmospheric neutrino problem. We calculate the matter effects arising due to propagation through earth. We demonstrate that these effects improve the fit to the electron data vis-a-vis vacuum oscillations but make the fit to the muon data far worse, thus worsening the overall fit. The results of our analytical calculation verify the numerical investigations of this scheme presented earlier by Fogli et al.

Sign in / Sign up

Export Citation Format

Share Document