scholarly journals Short-baseline electron neutrino oscillation length after the Troitsk experiment

2013 ◽  
Vol 87 (1) ◽  
Author(s):  
C. Giunti ◽  
M. Laveder ◽  
Y. F. Li ◽  
H. W. Long
Keyword(s):  
Neutrino Oscillation ◽  
Electron Neutrino ◽  
Short Baseline ◽  
Oscillation Length

scholarly journals Improved short-baseline neutrino oscillation search and energy spectrum measurement with the PROSPECT experiment at HFIR

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
M. Andriamirado ◽  
A. B. Balantekin ◽  
H. R. Band ◽  
C. D. Bass ◽  
D. E. Bergeron ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Neutrino Oscillation ◽  
Short Baseline ◽  
Spectrum Measurement

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 Yifang Wang: high energy physics in China

2016 ◽  
Vol 3 (2) ◽  
pp. 252-256 ◽  
Author(s):  
Ling Wang ◽  
Mu-ming Poo
Keyword(s):  
Neutrino Oscillation ◽  
Particle Physics ◽  
Quantum Interference ◽  
High Energy Physics ◽  
High Energy ◽  
Electron Neutrino ◽  
Daya Bay ◽  
Mass Hierarchy ◽  
Neutrino Mixing ◽  
Energy Physics

Abstract On 8 March 2012, Yifang Wang, co-spokesperson of the Daya Bay Experiment and Director of Institute of High Energy Physics, Chinese Academy of Sciences, announced the discovery of a new type of neutrino oscillation with a surprisingly large mixing angle (θ13), signifying ‘a milestone in neutrino research’. Now his team is heading for a new goal—to determine the neutrino mass hierarchy and to precisely measure oscillation parameters using the Jiangmen Underground Neutrino Observatory, which is due for completion in 2020. Neutrinos are fundamental particles that play important roles in both microscopic particle physics and macroscopic universe evolution. The studies on neutrinos, for example, may answer the question why our universe consists of much more matter than antimatter. But this is not an easy task. Though they are one of the most numerous particles in the universe and zip through our planet and bodies all the time, these tiny particles are like ‘ghost’, difficult to be captured. There are three flavors of neutrinos, known as electron neutrino (νe), muon neutrino (νμ), and tau neutrino (ντ), and their flavors could change as they travel through space via quantum interference. This phenomenon is known as neutrino oscillation or neutrino mixing. To determine the absolute mass of each type of neutrino and find out how they mix is very challenging. In a recent interview with NSR in Beijing, Yifang Wang explained how the Daya Bay Experiment on neutrino oscillation not only addressed the frontier problem in particle physics, but also harnessed the talents and existing technology in Chinese physics community. This achievement, Wang reckons, will not be an exception in Chinese high energy physics, when appropriate funding and organization for big science projects could be efficiently realized in the future.

scholarly journals Parallel Event Selection on HPC Systems

2019 ◽  
Vol 214 ◽  
pp. 04059
Author(s):  
Marc Paterno ◽  
Jim Kowalkowski ◽  
Saba Sehrish
Keyword(s):  
Neutrino Oscillation ◽  
Selection Criteria ◽  
High Performance ◽  
Electron Neutrino ◽  
Recent Measurement ◽  
Data Format ◽  
Event Selection ◽  
Full Dataset ◽  
Table Data ◽  
Electron Neutrino Appearance

In their recent measurement of the neutrino oscillation parameters, NOvA uses a sample of approximately 25 million reconstructed spills to search for electron-neutrino appearance events. These events are stored in an n-tuple format, in 250 thousand ROOT files. File sizes range from a few hundred KiB to a few MiB; the full dataset is approximately 1.4 TiB. These millions of events are reduced to a few tens of events by the application of strict event selection criteria, and then summarized by a handful of numbers each, which are used in the extraction of the neutrino oscillation parameters. The NOvA event selection code is currently a serial C++ program that reads these n-tuples. The current table data format and organization and the selection/ reduction processing involved provides us with an opportunity to explore alternate approaches to represent the data and implement the processing. We represent our n-tuple data in HDF5 format that is optimized for the HPC environment and which allows us to use the machine’s high-performance parallel I/O capabilities. We use MPI, numpy and h5py to implement our approach and compare the performance with the existing approach. We study the performance implications of using thousands of small files of different sizes as compared with one large file using HPC resources. This work has been done as part of the SciDAC project, “HEP analytics on HPC” in collaboration with the ASCR teams at ANL and LBNL.

scholarly journals Phenomenology of light sterile neutrinos

2015 ◽  
Vol 30 (20) ◽  
pp. 1530015
Author(s):  
Carlo Giunti
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Mixing ◽  
Sterile Neutrinos ◽  
Short Baseline ◽  
Mixing Schemes

We consider the extension of standard three-neutrino mixing with the addition of one or two light sterile neutrinos which can explain the anomalies found in short-baseline neutrino oscillation experiments. We review the results of the global analyses of short-baseline neutrino oscillation data in [Formula: see text] and [Formula: see text] neutrino mixing schemes.

scholarly journals Neutrino oscillations in the presence of super-light sterile neutrinos

2016 ◽  
Vol 31 (20n21) ◽  
pp. 1650123 ◽  
Author(s):  
Paraskevi Divari ◽  
John Vergados
Keyword(s):  
Sterile Neutrino ◽  
Neutral Current ◽  
Neutron Number ◽  
Electron Neutrino ◽  
Number Density ◽  
Sterile Neutrinos ◽  
Short Baseline ◽  
The Earth ◽  
Reactor Neutrino ◽  
Neutrino Experiments

In this paper, we study the effect of conversion of super-light sterile neutrino (SLSN) to electron neutrino in matter like that of the Earth. In the Sun the resonance conversion between SLSN and electron neutrino via the neutral current is suppressed due to the smallness of neutron number. On the other hand, neutron number density can play an important role in the Earth, making the scenario of SLSN quite interesting. The effect of CP-violating phases on active-SLSN oscillations is also discussed. Reactor neutrino experiments with medium or short baseline may probe the scenario of SLSN.

scholarly journals Appearance–disappearance relation in 3 + Ns short-baseline neutrino oscillations

2016 ◽  
Vol 31 (01) ◽  
pp. 1650003 ◽  
Author(s):  
C. Giunti ◽  
E. M. Zavanin
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Neutrino Mixing ◽  
Short Baseline ◽  
Mixing Schemes ◽  
Existing Data

We derive the relation between the amplitudes of short-baseline appearance and disappearance oscillations in [Formula: see text] neutrino mixing schemes which is the origin of the appearance–disappearance tension that is found from the analysis of the existing data in any [Formula: see text] neutrino mixing scheme. We illustrate the power of the relation to reveal the appearance–disappearance tension in the cases of [Formula: see text] and [Formula: see text] mixing using the results of global fits of short-baseline neutrino oscillation data.

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