Bulletin of the American Physical Society
APS April Meeting 2018
Volume 63, Number 4
Saturday–Tuesday, April 14–17, 2018; Columbus, Ohio
Session H08: Neutrino Beams I |
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Sponsoring Units: DPF Chair: Leonidas Aliaga, Fermi National Accelerator Laboratory Room: A110 |
Sunday, April 15, 2018 10:45AM - 10:57AM |
H08.00001: Latest Results From Searches for Neutral Current Disappearance in NOvA Tomas Nosek Although most of the recent experimental results on neutrino oscillations are consistent with three active neutrino flavors, some of them have shown deviations from standard oscillations (e.g. LSND, MiniBooNE, Gallium experiments) that can be explained by admixture of non-active flavors, i.e. the existence of light sterile neutrinos. NO$\nu$A searches for sterile neutrinos mixing with active neutrinos through a reduction in the rate of neutral current interactions over its 810 km long baseline. I will present the latest results on searches for active neutrino disappearance by looking for a deficit of neutral current events at the NO$\nu$A Far Detector using 8.85 $\times 10^{20}$ POT data. [Preview Abstract] |
Sunday, April 15, 2018 10:57AM - 11:09AM |
H08.00002: Latest Constraints on Mixing Parameters in Three-Flavor Neutrino Oscillations from NOvA Nitish Nayak NOvA is a long-baseline neutrino oscillation experiment that is designed to probe the neutrino mass hierarchy and mixing structure. It uses two functionally identical liquid scintillator detectors 14mrad off-axis from the NuMI beamline at Fermilab, allowing a tightly focused neutrino flux peaked at around 2 GeV. The Near Detector is located 100 m underground and is used to characterize the neutrino beam before oscillations. The Far Detector is placed at a distance of $810$ km from the beam source and is used to look for neutrino oscillations, primarily in the $\nu_{\mu}$ $\rightarrow$ $\nu_{\mu}$ and the $\nu_{\mu}$ $\rightarrow$ $\nu_{e}$ channels. In this talk, I will present an overview of the latest $\nu_{e}$ appearance analysis and the results from the joint fit to the $\nu_{\mu}$-disappearance and $\nu_{e}$-appearance analyses, utilizing an accumulated exposure of $8.85\times10^{20}$ protons-on-target. A number of improvements to the simulation, including detector and flux modelling have been incorporated and will also be briefly described. [Preview Abstract] |
Sunday, April 15, 2018 11:09AM - 11:21AM |
H08.00003: Muon Neutrino Disappearance at NOvA Vladimir Bychkov The NuMI Off-axis Electron Neutrino Appearance (NOvA) experiment can detect muon neutrinos and measure their disappearance via oscillation between the Near and Far Detectors. We will present recent results of muon neutrino disappearance analysis on 50\% higher statistics then previous published results. Better signal selection algorithm, based on deep neural network inspired by progress in computer vision community, is described. Improved detector simulation and re-tuned cosmic rejection and energy estimation algorithms as well as a new fit in four hadronic energy fraction populations are performed. The data allows us to make the joint world best measurement of $\delta m_{23}^2$. [Preview Abstract] |
Sunday, April 15, 2018 11:21AM - 11:33AM |
H08.00004: Status of DUNE experiment Luke Corwin, Jaroslaw Nowak The Deep Underground Neutrino Experiment (DUNE) provides a rich science program with the focus on the neutrino oscillation physics and proton decay studies. The high-intensity wide-band neutrino beam will be produced at Fermilab and will be directed to the 40 kt Liquid Argon far detector at the Sanford Underground Research Facility (SURF), 1300 km from Fermilab. One of the most important goals of the experiment is to determine the neutrino mass ordering and the measurement of the CP violating phase. The underground location of the large DUNE far detector and its excellent energy and spatial resolution will allow also conducting non-accelerator physics programs predicted by GUT models, such as nucleon decay or n-nbar oscillations. Moreover, it will be sensitive to measure of the electron neutrino flux from a core-collapse supernova providing valuable information on the mechanism of a supernova. This ambitious project involves worldwide contribution and extensive prototyping and testing program to guarantee that all parts of the technology are fully understood and well tested. Two such prototypes, in both single phase (ProtoDUNE-SP) and dual phase (ProtoDUNE-DP) technologies, are under construction and will be operated at the CERN Neutrino Platform (NP) starting in 2018. [Preview Abstract] |
Sunday, April 15, 2018 11:33AM - 11:45AM |
H08.00005: Design and Fabrication of the protoDUNE Dual Phase LArTPC Animesh Chatterjee The WA105 protoDUNE Dual Phase Liquid-argon Time Projection Chamber (LArTPC) is a large demonstrator based on the GLACIER design, with a 6x6x6 m3 (appr. 300t) active volume. Dual-phase LArTPCs are one of the far detector technology options foreseen for the Deep Underground Neutrino Experiment (DUNE) at Fermilab. Dual Phase (DP) refers to the extraction of ionization electrons at the interface between liquid and gaseous argon and their amplification and collection in the gas phase. ProtoDUNE will be operating at the CERN neutrino platform test beam facility. It not only serves as the engineering prototype of the FD, but will also demonstrate the concept of a very large dual-phase LAr TPC and calibrate it with charged particle test beam. We will briefly discuss the actual dimension of the design, fabrication, testing, installation and commissioning of the detector components at CERN. [Preview Abstract] |
Sunday, April 15, 2018 11:45AM - 11:57AM |
H08.00006: Neutrino induced Coherent Pion: Precision Study in DUNE ND Bing Guo We present a sensitivity study of neutrino induced Coherent-Pion (CohPi+) in a high-resolution tracker. The study is developed for the fine-grained tracker, serving as a near detector for DUNE. The study reveals that in DUNE, coherent pion production could offer the most precise constraints on three diacritical observables : (a) neutrino energy scale, (b) NuMuBar/NuMu flux, and (c) beam divergence, which are essential for precise measurements of the oscillation phenomena. [Preview Abstract] |
Sunday, April 15, 2018 11:57AM - 12:09PM |
H08.00007: Precision temperature gradient system for ProtoDune Yujing Sun DUNE is a world-leading long-baseline neutrino oscillation experiment which will measure fundamental physical parameters to unprecedented sensitivity and precision for addressing the neutrino mass hierarchy, CP violation in neutrino mixing, and resolving the octant of mixing angle θ23. In addition to precisely testing the 3-flavor neutrino model, DUNE will also provide the opportunity to search for nucleon decay, neutrinos emitted by supernovae in our galaxy and beyond. In order to test and validate the technologies and design that will be applied to the construction of the DUNE Far Detector, DUNE prototype detectors of the order of 1 kton LAr, are under construction at CERN. A precision temperature gradient measurement system designed by Univ. of Hawaii group will measure the LAr temperature gradient in protoDUNE over 7.5 m height with 5 mK precision. The temperature gradient in LArTPC is an excellent measure of the LAr purity and recirculation effectiveness which is a great challenge in kton scale LAr detectors. A temperature sensor array will be deployed and can be moved vertically by a linear actuator to achieve measurement precision, while increasing sampling capability, limiting the number of cables and feedthroughs and cross calibrating sensors. [Preview Abstract] |
Sunday, April 15, 2018 12:09PM - 12:21PM |
H08.00008: First Measurement of Monoenergetic Muon Neutrino Charged Current Interactions Rory Fitzpatrick The NuMI beam absorber provides an intense source of 236 MeV muon neutrino events originating from kaon decay at rest ($K^+ \rightarrow \mu^+ \nu_\mu$) that can be observed by the MiniBooNE detector, 86 meters away. The kaon decay at rest (KDAR) neutrino acts as a standard candle for studying neutrino-nucleus interactions, cross sections, and energy reconstruction in the 100s of MeV region and can be used for a number of precision measurements. The KDAR signal at MiniBooNE, observed with $3.9 \sigma$ significance, is distinguished from $\nu_\mu$ and $\bar{\nu}_\mu$ backgrounds using arrival time and reconstructed muon energy. I present the first measurement of neutrino-nucleus energy transfer ($\omega = E_\nu - E_\mu$) using neutrinos and prospects for future measurements. [Preview Abstract] |
Sunday, April 15, 2018 12:21PM - 12:33PM |
H08.00009: Abstract Withdrawn |
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