scholarly journals Active neutrino oscillations and the SNO neutral current measurement

2002 ◽  
Vol 66 (11) ◽  
Author(s):  
Alexis A. Aguilar-Arevalo ◽  
J. C. D’Olivo
Keyword(s):  
Neutrino Oscillations ◽  
Neutral Current ◽  
Current Measurement ◽  
Active Neutrino

scholarly journals Sterile-active neutrino oscillations and shortcuts in the extra dimension

2005 ◽  
Vol 72 (9) ◽  
Author(s):  
Heinrich Päs ◽  
Sandip Pakvasa ◽  
Thomas J. Weiler
Keyword(s):  
Extra Dimension ◽  
Neutrino Oscillations ◽  
Active Neutrino

scholarly journals WHAT CAN SNO NEUTRAL CURRENT RATE TEACH US ABOUT THE SOLAR NEUTRINO ANOMALY

2002 ◽  
Vol 17 (22) ◽  
pp. 1455-1464 ◽  
Author(s):  
ABHIJIT BANDYOPADHYAY ◽  
SANDHYA CHOUBEY ◽  
SRUBABATI GOSWAMI ◽  
D. P. ROY
Keyword(s):  
Neutrino Oscillation ◽  
Solar Neutrino ◽  
Survival Probability ◽  
Neutral Current ◽  
Neutrino Flux ◽  
Mixing Parameters ◽  
Active Neutrino ◽  
Quantitative Analyses

We investigate how the anticipated neutral current rate from SNO will sharpen our understanding of the solar neutrino anomaly. Quantitative analyses are performed with representative values of this rate in the expected range of 0.8–1.2. This would provide a 5–10σ signal for νe transition into a state containing an active neutrino component. Assuming this state to be purely active one can estimate both the 8 B neutrino flux and the νe survival probability to a much higher precision than currently possible. Finally the measured value of the NC rate will have profound implications for the mass and mixing parameters of the solar neutrino oscillation solution.

scholarly journals Search for GeV-Scale Sterile Neutrinos Responsible for Active Neutrino Oscillations and Baryon Asymmetry of the Universe

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
S. N. Gninenko ◽  
D. S. Gorbunov ◽  
M. E. Shaposhnikov
Keyword(s):  
Standard Model ◽  
Neutrino Oscillations ◽  
Sterile Neutrino ◽  
High Energy ◽  
Baryon Asymmetry ◽  
Decay Length ◽  
Neutrino Masses ◽  
Sterile Neutrinos ◽  
Active Neutrino ◽  
The Universe

Standard Model fails to explain neutrino oscillations, dark matter, and baryon asymmetry of the Universe. All these problems can be solved with three sterile neutrinos added to SM. Quite remarkably, if sterile neutrino masses are well below the electroweak scale, this modification—Neutrino Minimal Standard Model (νMSM)—can be tested experimentally. We discuss a new experiment on search for decays of GeV-scale sterile neutrinos, which are responsible for the matter-antimatter asymmetry generation and for the active neutrino masses. If lighter than 2 GeV, these particles can be produced in decays of charm mesons generated by high energy protons in a target, and subsequently decay into SM particles. To fully explore this sector ofνMSM, the new experiment requires data obtained with at least1020incident protons on target (achievable at CERN SPS in future) and a big volume detector constructed from a large amount of identical single modules, with a total sterile neutrino decay length of few kilometers. The preliminary feasibility study for the proposed experiment shows that it has sensitivity which may either lead to the discovery of new particles below the Fermi scale—right-handed partners of neutrinos—or rule out seesaw sterile neutrinos with masses below 2 GeV.

scholarly journals ONE-PION EVENTS BY ATMOSPHERIC NEUTRINOS: A THREE-FLAVOR ANALYSIS

2001 ◽  
Vol 16 (08) ◽  
pp. 1417-1429 ◽  
Author(s):  
K. R. S. BALAJI ◽  
G. RAJASEKARAN ◽  
S. UMA SANKAR
Keyword(s):  
Diagnostic Method ◽  
Neutrino Oscillations ◽  
Neutral Current ◽  
Charged Current ◽  
Atmospheric Neutrinos ◽  
Neutrino Mixing ◽  
Mixing Angles ◽  
Flavor Oscillations ◽  
Flavor Analysis ◽  
The One

We study the one-pion events produced via neutral current (NC) and charged current (CC) interactions by the atmospheric neutrinos. We analyze the ratios of CC events to the NC events in the framework of neutrino oscillations. These ratios can distinguish between different combinations of neutrino mixing angles in the case of three-flavor oscillations. They also provide a good diagnostic method to distinguish νμ→ντ oscillations from νμ→νs oscillations.

scholarly journals The MINOS Experiment: Results and Prospects

2013 ◽  
Vol 2013 ◽  
pp. 1-18 ◽  
Author(s):  
J. J. Evans
Keyword(s):  
Neutrino Oscillation ◽  
Precise Measurement ◽  
Neutral Current ◽  
Mass Splitting ◽  
Neutrino Beam ◽  
Muon Neutrinos ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Active Neutrino ◽  
Current Interaction

The MINOS experiment has used the world’s most powerful neutrino beam to make precision neutrino oscillation measurements. By observing the disappearance of muon neutrinos, MINOS has made the world’s most precise measurement of the larger neutrino mass splitting and has measured the neutrino mixing angleθ23. Using a dedicated antineutrino beam, MINOS has made the first direct precision measurements of the corresponding antineutrino parameters. A search forνeandν-eappearance has enabled a measurement of the mixing angleθ13. A measurement of the neutral-current interaction rate has confirmed oscillation between three active neutrino flavours. MINOS will continue as MINOS+ in an upgraded beam with higher energy and intensity, allowing precision tests of the three-flavour neutrino oscillation picture, in particular a very sensitive search for the existence of sterile neutrinos.

scholarly journals Measuring active-to-sterile neutrino oscillations with neutral current coherent neutrino-nucleus scattering

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
A. J. Anderson ◽  
J. M. Conrad ◽  
E. Figueroa-Feliciano ◽  
C. Ignarra ◽  
G. Karagiorgi ◽  
...  
Keyword(s):  
Neutrino Oscillations ◽  
Sterile Neutrino ◽  
Neutral Current ◽  
Nucleus Scattering

OSCILLATION EFFECTS ON NEUTRINOS FROM THE EARLY PHASE OF A NEARBY SUPERNOVA

2000 ◽  
Vol 15 (14) ◽  
pp. 2105-2120
Author(s):  
DEBASISH MAJUMDAR ◽  
AMITAVA RAYCHAUDHURI ◽  
KAMALES KAR ◽  
ALAK RAY ◽  
FIROZA K. SUTARIA
Keyword(s):  
Neutrino Mass ◽  
Neutrino Oscillations ◽  
Neutral Current ◽  
Mass Difference ◽  
Solar Neutrinos ◽  
Electron Neutrino ◽  
Charged Current ◽  
Current Channel ◽  
Flavor Oscillation ◽  
Collapse Phase

Recent observations of atmospheric and solar neutrinos strongly support the phenomenon of neutrino oscillations — a manifestation of a nonzero and nondegenerate mass spectrum. Neutrinos emitted during stellar core collapse leading to a supernova are of the electron neutrino type at source — as for solar and reactor (anti-)neutrinos — and provide another useful tool in the search for flavor oscillations. Their propagation to an earth-bound detector involves length scales that can uniquely probe very small neutrino mass differences hitherto unobservable. Although the number of neutrinos emitted during the collapse phase is much smaller than that emitted in the post-bounce epoch (in which all flavors of neutrinos are emitted), a nearby supernova event may nevertheless register a substantial number of detections from the collapse phase at SuperKamiokande (SK) and the Sudbury Neutrino Observatory (SNO). The measurement of the fluence of these neutrinos at SNO and the distortion of the spectrum detected at SK can yield valuable information about neutrino mass difference and mixing which are illustrated here in terms of two- and three-flavor oscillation models. In particular, we find that R SNO , the ratio of the calorimetric detection of the neutrino fluence via the neutral current channel to the total energy integrated fluence observed via the charged current channel at SNO, is a sensitive probe for oscillations. We also find that αn, the ratio of the nth central moments of the distributions seen at SK and SNO (charged current), can be a useful tool (especially for n=3) to look for neutrino oscillations.

scholarly journals Search for Active Neutrino Disappearance Using Neutral-Current Interactions in the MINOS Long-Baseline Experiment

2008 ◽  
Vol 101 (22) ◽  
Author(s):  
P. Adamson ◽  
C. Andreopoulos ◽  
K. E. Arms ◽  
R. Armstrong ◽  
D. J. Auty ◽  
...  
Keyword(s):  
Neutral Current ◽  
Long Baseline ◽  
Active Neutrino ◽  
Baseline Experiment
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