scholarly journals Matter versus vacuum oscillations at long-baseline accelerator neutrino experiments

2021 ◽  
Vol 36 (13) ◽  
pp. 2150098
Author(s):  
Suman Bharti ◽  
Ushak Rahaman ◽  
S. Uma Sankar
Keyword(s):  
Neutrino Oscillation ◽  
Future Experiment ◽  
Matter Effects ◽  
Long Baseline ◽  
The Future ◽  
Neutrino Experiments ◽  
Rule Out

The neutrino oscillation probabilities at the long-baseline accelerator neutrino experiments are expected to be modified by matter effects. We search for evidence of such modification in the data of T2K and NO[Formula: see text]A, by fitting the data to the hypothesis of (a) matter modified oscillations and (b) vacuum oscillations. We find that vacuum oscillations provide as good a fit to the data as matter modified oscillations. Even extended runs of T2K and NO[Formula: see text]A, with five years in neutrino mode [Formula: see text] and five years in anti-neutrino mode [Formula: see text], cannot make a [Formula: see text] distinction between vacuum and matter modified oscillations. The future experiment DUNE, with neutrino and anti-neutrino runs of five years each [Formula: see text], can rule out vacuum oscillations by itself at [Formula: see text] if the hierarchy is normal. If the hierarchy is inverted, a [Formula: see text] discrimination against vacuum oscillations requires the combination of [Formula: see text] runs of T2K, NO[Formula: see text]A and DUNE.

scholarly journals DETERMINING THE SIGN OF Δ31 AT LONG BASELINE NEUTRINO EXPERIMENTS

2001 ◽  
Vol 16 (29) ◽  
pp. 1881-1886
Author(s):  
MOHAN NARAYAN ◽  
S. UMA SANKAR
Keyword(s):  
High Intensity ◽  
Low Energy ◽  
Earth’S Crust ◽  
Mixing Angle ◽  
Background Ratio ◽  
Matter Effects ◽  
Long Baseline ◽  
Earth's Crust ◽  
Neutrino Experiments

Recently it is advocated that high intensity and low energy (Eν~2 GeV ) neutrino beams should be built to probe the (13) mixing angle ϕ to a level of a few parts in 104. Experiments using such beams will have better signal-to-background ratio in searches for νμ→νe oscillations. We propose that such experiments can also determine the sign of Δ31 even if the beam consists of neutrinos only. By measuring the νμ→νe transitions in two different energy ranges, the effects due to propagation of neutrinos through earth's crust can be isolated and the sign of Δ31 can be determined. If the sensitivity of an experiment to ϕ is ε, then the same experiment is automatically sensitive to matter effects and the sign of Δ31 for values of ϕ≥2ε.

Future prospects in neutrino physics

2021 ◽  
pp. 2130007
Author(s):  
Sandhya Choubey
Keyword(s):  
Neutrino Physics ◽  
Neutrino Oscillation ◽  
Atmospheric Neutrino ◽  
New Physics ◽  
Future Prospects ◽  
The Past ◽  
Long Baseline ◽  
Neutrino Experiments

Neutrino physics has come a long way and made great strides in the past decades. We discuss the prospects of what more can be learned in this field in the forthcoming neutrino oscillation facilities. We will mostly focus on the potential of the long-baseline experiments and the atmospheric neutrino experiments. Sensitivity of these experiments to standard neutrino oscillation parameters will be presented. We will also discuss the prospects of new physics searches at these facilities.

scholarly journals REVIEW OF SOLAR AND REACTOR NEUTRINOS

2006 ◽  
Vol 21 (08n09) ◽  
pp. 1855-1868 ◽  
Author(s):  
ALAN W. P. POON
Keyword(s):  
Neutrino Oscillation ◽  
Direct Evidence ◽  
The Sun ◽  
The Earth ◽  
The Future ◽  
Reactor Neutrino ◽  
Reactor Neutrinos ◽  
Neutrino Experiments

Over the last several years, experiments have conclusively demonstrated that neutrinos are massive and that they mix. There is now direct evidence for νe s from the Sun transforming into other active flavors while en route to the Earth. The disappearance of reactor [Formula: see text], predicted under the assumption of neutrino oscillation, has also been observed. In this paper, recent results from solar and reactor neutrino experiments and their implications are reviewed. In addition, some of the future experimental endeavors in solar and reactor neutrinos are presented.

scholarly journals Testing NSI suggested by solar neutrino tension in T2HKK and DUNE

2020 ◽  
Vol 35 (17) ◽  
pp. 2050142
Author(s):  
Monojit Ghosh ◽  
Osamu Yasuda
Keyword(s):  
Parameter Space ◽  
Solar Neutrino ◽  
Global Analysis ◽  
Solar Neutrinos ◽  
Long Baseline ◽  
The Future ◽  
Neutrino Experiments ◽  
Best Fit ◽  
Dependent Interaction ◽  
Neutrino Propagation

It was shown that the tension between the mass-squared differences obtained from solar neutrinos and those acquired through KamLAND experiments may be solved by the introduction of a non-standard flavor-dependent interaction (NSI) in neutrino propagation. In this study, we discuss the possibility of testing such a hypothesis using the future long-baseline neutrino experiments T2HKK and DUNE. Assuming that the NSI does not exist, we provide the excluded region within the ([Formula: see text], [Formula: see text]) plane, where [Formula: see text] and [Formula: see text] are the parameters appearing in the solar neutrino analysis conducted with the NSI. We find that the best fit value from the solar neutrino and KamLAND data (global analysis of a particular coupling to quarks) can be tested at more than [Formula: see text] by these two experiments for most of the parameter space.

scholarly journals Testing matter effects in very long baseline neutrino oscillation experiments

2000 ◽  
Vol 578 (1-2) ◽  
pp. 27-57 ◽  
Author(s):  
M. Freund ◽  
M. Lindner ◽  
S.T. Petcov ◽  
A. Romanino
Keyword(s):  
Neutrino Oscillation ◽  
Matter Effects ◽  
Long Baseline

scholarly journals LONG BASELINE NEUTRINO EXPERIMENTS WITH TWO-DETECTOR SETUP

2008 ◽  
Vol 23 (21) ◽  
pp. 3388-3394
Author(s):  
HISAKAZU MINAKATA
Keyword(s):  
Cp Violation ◽  
Neutrino Oscillation ◽  
Neutrino Mass ◽  
Mass Hierarchy ◽  
Neutrino Mass Hierarchy ◽  
Neutrino Factory ◽  
Long Baseline ◽  
Neutrino Experiments

I discuss why and how powerful is the two-detector setting in neutrino oscillation experiments. I cover three concrete examples: (1) reactor θ13 experiments, (2) T2KK, Tokai-to-Kamioka-Korea two-detector complex for measuring CP violation, determining the neutrino mass hierarchy, and resolving the eight-fold parameter degeneracy, (3) two-detector setting in a neutrino factory at baselines 3000 km and 7000 km for detecting effects of non-standard interactions (NSI) of neutrinos.

scholarly journals UNVEILING NEUTRINO MIXING AND LEPTONIC CP VIOLATION

2005 ◽  
Vol 20 (01) ◽  
pp. 1-17 ◽  
Author(s):  
OLGA MENA
Keyword(s):  
Cp Violation ◽  
Neutrino Oscillation ◽  
Neutrino Masses ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Long Baseline ◽  
Neutrino Experiments ◽  
Two Parameters ◽  
Present Understanding ◽  
Neutrino Masses And Mixings

We review the present understanding of neutrino masses and mixings, discussing what are the unknowns in the three-family oscillation scenario. Despite the anticipated success coming from the planned long baseline neutrino experiments in unraveling the leptonic mixing sector, there are two important unknowns which may remain obscure: the mixing angle θ13 and the CP-phase δ. The measurement of these two parameters has led us to consider the combination of superbeams and neutrino factories as the key to unveil the neutrino oscillation picture.

scholarly journals Development of an analysis to probe the neutrino mass ordering with atmospheric neutrinos using three years of IceCube DeepCore data

2020 ◽  
Vol 80 (1) ◽  
Author(s):  
M. G. Aartsen ◽  
M. Ackermann ◽  
J. Adams ◽  
J. A. Aguilar ◽  
M. Ahlers ◽  
...  
Keyword(s):  
Neutrino Physics ◽  
Neutrino Mass ◽  
Atmospheric Neutrinos ◽  
Oscillation Pattern ◽  
Normal Ordering ◽  
Matter Effects ◽  
Long Baseline ◽  
Systematic Uncertainties ◽  
Neutrino Experiments ◽  
Rigorous Method

AbstractThe Neutrino Mass Ordering (NMO) remains one of the outstanding questions in the field of neutrino physics. One strategy to measure the NMO is to observe matter effects in the oscillation pattern of atmospheric neutrinos above $$\sim 1\,\mathrm {GeV}$$∼1GeV, as proposed for several next-generation neutrino experiments. Moreover, the existing IceCube DeepCore detector can already explore this type of measurement. We present the development and application of two independent analyses to search for the signature of the NMO with three years of DeepCore data. These analyses include a full treatment of systematic uncertainties and a statistically-rigorous method to determine the significance for the NMO from a fit to the data. Both analyses show that the dataset is fully compatible with both mass orderings. For the more sensitive analysis, we observe a preference for normal ordering with a p-value of $$p_\mathrm {IO} = 15.3\%$$pIO=15.3% and $$\mathrm {CL}_\mathrm {s}=53.3\%$$CLs=53.3% for the inverted ordering hypothesis, while the experimental results from both analyses are consistent within their uncertainties. Since the result is independent of the value of $$\delta _\mathrm {CP}$$δCP and obtained from energies $$E_\nu \gtrsim 5\,\mathrm {GeV}$$Eν≳5GeV, it is complementary to recent results from long-baseline experiments. These analyses set the groundwork for the future of this measurement with more capable detectors, such as the IceCube Upgrade and the proposed PINGU detector.

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