scholarly journals The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment

2014 ◽  
Vol 2014 (5) ◽  
Author(s):  
S.K. Agarwalla ◽  
◽  
L. Agostino ◽  
M. Aittola ◽  
A. Alekou ◽  
...  
Keyword(s):  
Cp Violation ◽  
Neutrino Experiment ◽  
Mass Hierarchy ◽  
Long Baseline

scholarly journals Probing CP violation at LBNE with reactor experiments

2015 ◽  
Vol 30 (07) ◽  
pp. 1550017 ◽  
Author(s):  
Debajyoti Dutta ◽  
Kalpana Bora
Keyword(s):  
Cp Violation ◽  
Precise Measurement ◽  
Neutrino Experiment ◽  
Mass Hierarchy ◽  
Mixing Angle ◽  
The Third ◽  
Long Baseline ◽  
Discovery Potential ◽  
Text Mode ◽  
The Impact

In this work, we have explored the possibilities of improving CP violation (CPV) discovery potential of newly planned Long-Baseline Neutrino Experiment (LBNE), USA, by combining with data from reactors. The third mixing angle θ13 is now very precisely measured and this precise measurement of θ13 helps in the measurement of CPV. Here, CPV is studied with and without data from reactors. The impact of placing a neutrino data (ND) is also studied. It is found that CPV discovery potential of LBNE with ND increases when combined with data from reactors. With a far detector of 35 kt, it is possible to obtain 5σ sensitivity of CPV when run for 5 years in ν and 5 years in [Formula: see text] mode. When normal hierarchy is assumed, CPV sensitivity is maximum. CPV discovery is possible by combining 5 years neutrino data from LBNE with 3 years anti-neutrino data from reactors. This study reveals that CPV can also be discovered at 5σ cl in inverted mass hierarchy (IH) mode when appearance measurement of LBNE is combined with reactors.

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 Optimal configurations of the Deep Underground Neutrino Experiment

2016 ◽  
Vol 31 (07) ◽  
pp. 1650020 ◽  
Author(s):  
Vernon Barger ◽  
Atri Bhattacharya ◽  
Animesh Chatterjee ◽  
Raj Gandhi ◽  
Danny Marfatia ◽  
...  
Keyword(s):  
Beam Power ◽  
Neutrino Experiment ◽  
Mass Hierarchy ◽  
Atmospheric Neutrinos ◽  
Near Detector ◽  
Neutrino Sector ◽  
Long Baseline ◽  
Systematic Uncertainties ◽  
Deep Underground ◽  
Using Data

We perform a comprehensive study of the ability of the Deep Underground Neutrino Experiment (DUNE) to answer outstanding questions in the neutrino sector. We consider the sensitivities to the mass hierarchy, the octant of [Formula: see text] and to CP violation using data from beam and atmospheric neutrinos. We evaluate the dependencies on the precision with which [Formula: see text] will be measured by reactor experiments, on the detector size, beam power and exposure time, on detector magnetization, and on the systematic uncertainties achievable with and without a near detector. We find that a 35 kt far detector in DUNE with a near detector will resolve the eightfold degeneracy that is intrinsic to long baseline experiments and will meet the primary goals of oscillation physics that it is designed for.

scholarly journals Accelerator Design for 1.3 MW Beam Power Operation of the J-PARC Main Ring

2021 ◽  
Author(s):  
Susumu Igarashi ◽  
Kenichirou Satou ◽  
Chihiro Ohmori ◽  
Yoshitugu Arakaki ◽  
Masashi Furusawa ◽  
...  
Keyword(s):  
Cp Violation ◽  
New Technologies ◽  
Short Paper ◽  
Beam Power ◽  
Neutrino Experiment ◽  
Beam Loss ◽  
Long Baseline ◽  
Main Ring ◽  
Technical Design Report ◽  
Accelerator Design

Abstract The J-PARC Main Ring (MR) has supplied the high-intensity proton beam for the T2K long-baseline neutrino experiment since 2010. The present beam power is 510 kW and the total number of protons on the target reaches 3.64 × 1021. To observe CP violation in the lepton sector with high accuracy, more protons need to be delivered to the T2K target. The project to upgrade the beam power to 1.3 MW started as a mid-term plan of the MR. In parallel to preparing a full technical design report, the technical designs of hardware upgrades using new technologies and all accelerator components that are necessary to deliver the 1.3-MW beam power are summarized and consolidated in this short paper. Further, this paper includes beam dynamics studies and simulation results for handling 3.3 × 1014 protons per pulse (ppp) without significant beam loss in the ring and transport lines. The Hyper-Kamiokande (HK) project has recently been approved, and construction has started; the MR upgrade and HK project will work together efficiently to study the CP violation.

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 Probing baryogenesis with neutron-antineutron oscillations

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Kåre Fridell ◽  
Julia Harz ◽  
Chandan Hati
Keyword(s):  
Cp Violation ◽  
Degrees Of Freedom ◽  
Small Mass ◽  
New Physics ◽  
Effective Field ◽  
Baryon Asymmetry ◽  
Neutrino Experiment ◽  
Mass Hierarchy ◽  
Theory Approach ◽  
Close Link

Abstract In the near future, the Deep Underground Neutrino Experiment and the European Spallation Source aim to reach unprecedented sensitivity in the search for neutron-antineutron (n-$$ \overline{n} $$ n ¯ ) oscillations, whose observation would directly imply |∆B| = 2 violation and hence might hint towards a close link to the mechanism behind the observed baryon asymmetry of the Universe. In this work, we explore the consequences of such a discovery for baryogenesis first within a model-independent effective field theory approach. We then refine our analysis by including a source of CP violation and different hierarchies between the scales of new physics using a simplified model. We analyse the implication for baryogenesis in different scenarios and confront our results with complementary experimental constraints from dinucleon decay, LHC, and meson oscillations. We find that for a small mass hierarchy between the new degrees of freedom, an observable rate for n-$$ \overline{n} $$ n ¯ oscillation would imply that the washout processes are too strong to generate any sizeable baryon asymmetry, even if the CP violation is maximal. On the other hand, for a large hierarchy between the new degrees of freedom, our analysis shows that successful baryogenesis can occur over a large part of the parameter space, opening the window to be probed by current and future colliders and upcoming n-$$ \overline{n} $$ n ¯ oscillation searches.

scholarly journals Exploring Light Sterile Neutrinos at Long Baseline Experiments: A Review

Universe ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 41
Author(s):  
Antonio Palazzo
Keyword(s):  
Cp Violation ◽  
Sterile Neutrino ◽  
Mass Hierarchy ◽  
Short Baseline ◽  
Neutrino Mass Hierarchy ◽  
Long Baseline ◽  
Discovery Potential ◽  
Neutrino Experiments ◽  
The Impact

Several anomalies observed in short-baseline neutrino experiments suggest the existence of new light sterile neutrino species. In this review, we describe the potential role of long-baseline experiments in the searches of sterile neutrino properties and, in particular, the new CP-violation phases that appear in the enlarged 3 + 1 scheme. We also assess the impact of light sterile states on the discovery potential of long-baseline experiments of important targets such as the standard 3-flavor CP violation, the neutrino mass hierarchy, and the octant of θ 23 .

scholarly journals COMPARISONS AND COMBINATIONS OF REACTOR AND LONG-BASELINE NEUTRINO OSCILLATION MEASUREMENTS

2006 ◽  
Vol 21 (18) ◽  
pp. 3825-3843 ◽  
Author(s):  
K. B. M. MAHN ◽  
M. H. SHAEVITZ
Keyword(s):  
Cp Violation ◽  
Neutrino Oscillation ◽  
Parameter Space ◽  
Experimental Measurement ◽  
Measurement Errors ◽  
Mass Hierarchy ◽  
Neutrino Mixing ◽  
Precise Information ◽  
Long Baseline ◽  
Active Neutrino

We investigate how the data from various future neutrino oscillation experiments will constrain the physics parameters for a three active neutrino mixing model. The investigations properly account for the degeneracies and ambiguities associated with the phenomenology as well as estimates of experimental measurement errors. Combinations of various reactor measurements with the expected J-PARC (T2K) and NuMI offaxis (Nova) data, both with and without the increased flux associated with proton driver upgrades, are considered. The studies show how combinations of reactor and offaxis data can resolve degeneracies (e.g. the θ23 degeneracy) and give more precise information on the oscillation parameters. A primary purpose of this investigation is to establish the parameter space regions where CP violation can be discovered and where the mass hierarchy can be determined. We find that, even with augmented flux from proton drivers, such measurements demand that sin 2 2θ13 be fairly large and in the range where it is measurable by reactor experiments.

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