scholarly journals Results from the NOvA Experiment

2018 ◽  
Vol 46 ◽  
pp. 1860038 ◽  
Author(s):  
Erica Smith
Keyword(s):  
Electron Neutrino ◽  
Muon Neutrino ◽  
Precision Measurements ◽  
Neutrino Beam ◽  
Mass Hierarchy ◽  
Long Baseline ◽  
Neutrino Oscillation Experiment ◽  
Numi Beam ◽  
Electron Neutrino Appearance ◽  
Atmospheric Mass

The NOvA experiment is a long-baseline accelerator-based neutrino oscillation experiment. It uses the upgraded NuMI beam from Fermilab to measure electron-neutrino appearance and muon-neutrino disappearance between the Near Detector, located at Fermilab, and the Far Detector, located at Ash River, Minnesota. The NuMI beam has recently reached and surpassed the 700 kW power benchmark. NOvA’s primary physics goals include precision measurements of oscillation parameters, such as [Formula: see text] and the atmospheric mass-squared splitting, along with probes of the mass hierarchy and of the CP violating phase. This talk will present the latest NOvA results, based on a neutrino beam exposure equivalent to [Formula: see text] protons-on-target.

scholarly journals T2K and Beyond

2016 ◽  
Vol 2016 ◽  
pp. 1-17
Author(s):  
M. G. Catanesi
Keyword(s):  
State Of The Art ◽  
New Physics ◽  
Electron Neutrino ◽  
Muon Neutrino ◽  
Precision Measurements ◽  
Neutrino Beam ◽  
Mixing Angle ◽  
Long Baseline ◽  
Physics Potential ◽  
Electron Neutrino Appearance

This paper presents thestate of the artof the T2K experiment and the measurements prospects for the incoming years. After a brief description of the experiment, the most recent results will be illustrated. The observation of the electron neutrino appearance in a muon neutrino beam and the new high-precision measurements of the mixing angleθ13by the reactor experiments have led to a reevaluation of the expected sensitivity to the oscillation parameters, relative to what was given in the original T2K proposal. For this reason the new physics potential of T2K for7.8×1021p.o.t. and for data exposure 3 times larger than that expected to be reachable with accelerator and beam line upgrades in 2026 before the start of operation of the next generation of long-baseline neutrino oscillation experiments will also be described in the text. In particular the last challenging scenario opens the door to the possibility of obtaining, under some conditions, a 3σmeasurement excludingsin⁡(δCP)=0.

scholarly journals Latest Results from the T2K Neutrino Experiment

Universe ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 21
Author(s):  
Dean Karlen ◽  
on behalf of the TtwoK Collaboration
Keyword(s):  
Cp Violation ◽  
Neutrino Oscillation ◽  
Neutrino Mass ◽  
Electron Neutrino ◽  
Muon Neutrino ◽  
Neutrino Experiment ◽  
Long Baseline ◽  
Neutrino Oscillation Experiment ◽  
Electron Neutrino Appearance ◽  
Oscillation Experiment

The T2K long baseline neutrino oscillation experiment measures muon neutrino disappearance and electron neutrino appearance in accelerator-produced neutrino and anti-neutrino beams. This presentation reports on the analysis of our data from an exposure of 2 . 6 × 10 21 protons on target. Results for oscillation parameters, including the CP violation parameter and neutrino mass ordering, are shown.

scholarly journals Results on Neutrino and Antineutrino Oscillations from the NOvA Experiment

2019 ◽  
Vol 64 (7) ◽  
pp. 613
Author(s):  
T. Nosek
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Mass ◽  
Muon Neutrino ◽  
Neutrino Beam ◽  
Mass Hierarchy ◽  
Neutrino Mass Hierarchy ◽  
Long Baseline ◽  
Neutrino Oscillation Experiment ◽  
Beam Mode ◽  
Oscillation Experiment

NOvA is a two-detector long-baseline neutrino oscillation experiment using Fermilab’s 700 kW NuMI muon neutrino beam. With a total exposure of 8.85×1020 +12.33×1020 protons on target delivered to NuMI in the neutrino + antineutrino beam mode (78% more antineutrino data than in 2018), the experiment has made a 4.4q-significant observation of the ve appearance in a vм beam, measured oscillation parameters |Δm232|, sin2O23, and excluded most values near бCP = п/2 for the inverted neutrino mass hierarchy by more than 3q.

scholarly journals Long-Baseline Neutrino Oscillation Experiments

2013 ◽  
Vol 2013 ◽  
pp. 1-30 ◽  
Author(s):  
G. J. Feldman ◽  
J. Hartnell ◽  
T. Kobayashi
Keyword(s):  
Neutrino Oscillation ◽  
Electron Neutrino ◽  
Mass Hierarchy ◽  
Unknown Parameters ◽  
Long Baseline ◽  
Oscillatory Pattern ◽  
Oscillation Phenomenon ◽  
The Standard Model ◽  
Good Energy ◽  
Electron Neutrino Appearance

A review of accelerator long-baseline neutrino oscillation experiments is provided, including all experiments performed to date and the projected sensitivity of those currently in progress. Accelerator experiments have played a crucial role in the confirmation of the neutrino oscillation phenomenon and in precision measurements of the parameters. With a fixed baseline and detectors providing good energy resolution, precise measurements of the ratio of distance/energy (L/E) on the scale of individual events have been made and the expected oscillatory pattern resolved. Evidence for electron neutrino appearance has recently been obtained, opening a door for determining the CP violating phase as well as resolving the mass hierarchy and the octant ofθ23; some of the last unknown parameters of the standard model extended to include neutrino mass.

scholarly journals Observation of Electron Neutrino Appearance in a Muon Neutrino Beam

2014 ◽  
Vol 112 (6) ◽  
Author(s):  
K. Abe ◽  
J. Adam ◽  
H. Aihara ◽  
T. Akiri ◽  
C. Andreopoulos ◽  
...  
Keyword(s):  
Electron Neutrino ◽  
Muon Neutrino ◽  
Neutrino Beam ◽  
Electron Neutrino Appearance

scholarly journals Evidence of electron neutrino appearance in a muon neutrino beam

2013 ◽  
Vol 88 (3) ◽  
Author(s):  
K. Abe ◽  
N. Abgrall ◽  
H. Aihara ◽  
T. Akiri ◽  
J. B. Albert ◽  
...  
Keyword(s):  
Electron Neutrino ◽  
Muon Neutrino ◽  
Neutrino Beam ◽  
Electron Neutrino Appearance

scholarly journals Indication of Electron Neutrino Appearance from an Accelerator-Produced Off-Axis Muon Neutrino Beam

2011 ◽  
Vol 107 (4) ◽  
Author(s):  
K. Abe ◽  
N. Abgrall ◽  
Y. Ajima ◽  
H. Aihara ◽  
J. B. Albert ◽  
...  
Keyword(s):  
Electron Neutrino ◽  
Muon Neutrino ◽  
Neutrino Beam ◽  
Electron Neutrino Appearance

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 Measurement of Neutrino Oscillations with Neutrino Telescopes

2013 ◽  
Vol 2013 ◽  
pp. 1-16 ◽  
Author(s):  
Jürgen Brunner
Keyword(s):  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
Neutrino Beam ◽  
Mass Hierarchy ◽  
Atmospheric Neutrinos ◽  
Neutrino Mass Hierarchy ◽  
Neutrino Telescopes ◽  
Long Baseline ◽  
Scientific Results

IceCube and ANTARES are the world-largest neutrino telescopes. They are successfully taking data, producing a wealth of scientific results. Whereas their main goal is the detection of cosmic neutrinos with energies in the TeV-PeV range, both have demonstrated their capability to measure neutrino oscillations by studying atmospheric neutrinos with energies of 10–50 GeV. After recalling the methods of these measurements and the first published results of these searches, the potential of existing, and planned low-energy extensions of IceCube and KM3Net are discussed. These new detectors will be able to improve the knowledge of the atmospheric neutrino oscillation parameters, and in particular they might help to understand the neutrino mass hierarchy. Such studies, which use atmospheric neutrinos, could be complemented by measurements in a long-baseline neutrino beam, which is discussed as a long-term future option.

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