Bulletin of the American Physical Society
APS April Meeting 2018
Volume 63, Number 4
Saturday–Tuesday, April 14–17, 2018; Columbus, Ohio
Session D08: Neutrino Physics: Results and New Initiatives II |
Hide Abstracts |
Sponsoring Units: DPF Chair: Adam Aurisano, University of Cincinnati Room: A110 |
Saturday, April 14, 2018 3:30PM - 3:42PM |
D08.00001: Search for CEvNS at the SNS with the COHERENT experiment Ivan Tolstukhin The COHERENT experiment at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS) aims to study coherent elastic neutrino nucleus scattering (CEvNS) with different detector technologies. The first observation of CEvNS was recently made by the COHERENT experiment with a \SI{14}{\kg} \ce{CsI} detector.\footnote{\href{http://science.sciencemag.org/content/early/2017/08/02/science.aao0990 }{\textit{D. Akimov et al., Science} \textbf{357}, 1123 (2017).}} The result is in agreement with the standard model prediction. This initial data already improves constraints on non-standard neutrino interactions. In addition, COHERENT has a \SI{185}{\kg} \ce{NaI} crystal array, a \about\SI{22}{\kg} \ce{LAr} detector and is planning to deploy a \SI{10}{\kg} \ce{PPC HPGe}. The single-phase \ce{LAr} detector (CENNS-10) started data-taking in Dec. 2016 and will provide results on CEvNS from a light nucleus where nuclear form factors are close to unity. The motivation for CEvNS detection, COHERENT experiment overview, the first CEvNS measurement, and a survey of the future experimental program will be presented. [Preview Abstract] |
Saturday, April 14, 2018 3:42PM - 3:54PM |
D08.00002: Status of CEvNS Search with the CENNS-10 Liquid Argon Detecor for COHERENT Matthew Heath The COHERENT experiment at the Spallation Neutron Source at Oak Ridge National Lab recently observed Coherent Elastic Neutrino Nucleus Scattering (CEvNS) at the 6.7$\sigma$ level with 14 kg of CsI commissioned in June 2015. COHERENT is intending to measure CEvNS on multiple nuclei to verify the $N^{2}$ dependence of the CEvNS cross section. To that end, the roughly 30 kg single phase liquid argon detector CENNS-10 was commissioned in December 2016. CENNS-10 will provide a much lighter nucleus for CEvNS scattering. In this talk I will present initial results of the `Phase 1' liquid argon run covering Dec. 2016 - May 2017 as well as a first look at `Phase 2' data after an upgrade to improve the light collection efficiency was performed and additional shielding installed in Summer 2017. [Preview Abstract] |
Saturday, April 14, 2018 3:54PM - 4:06PM |
D08.00003: The Coherent Neutrino-Nucleus Interaction Experiment Guillermo Fermandez Moroni, for the CONNIE collaboration The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) uses fully depleted high-resistivity CCDs as particle detectors with the goal of measuring the Coherent Elastic Neutrino-Nucleus Scattering (CENNS) of reactor antineutrinos with silicon nuclei. The CONNIE detector operates at a distance of 30m from the core of the Angra II 3.8 GW nuclear reactor in Brazil. The detector has demonstrated stable operation, low noise of less than $2e^-$ RMS, and low background contamination levels. CENNS provides a test of the Standard Model (SM) and may be a probe of physics beyond the SM. Also, in astrophysics, understanding the coherent interaction is relevant for the energy transport in supernovae and is a limiting factor in ongoing efforts for developing new supernovae models. On the other hand there has been a growing interest in recent years on nuclear reactor monitoring using neutrinos and CCDs could make compact/portable detectors. In this talk, the current status of the experiment will be presented together with the recent results after two years of data taking. The talk will also cover our constraints to more exotic models like the neutrino magnetic moment. We will also discuss the prospects of neutrino detection with CCDs for the upcoming years using the Skipper CCD technology. [Preview Abstract] |
Saturday, April 14, 2018 4:06PM - 4:18PM |
D08.00004: Non-Standard Neutrino Interactions in COHERENT Gleb Sinev The Standard Model of particle physics and the phenomenological model of neutrino oscillations have described data of most neutrino experiments remarkably well so far; however, some regions of the non-standard-neutrino-interaction (NSI) parameter space remain largely unexplored. Certain currently allowed NSI couplings, if realized, can create ambiguities for measurements of long-sought-after Standard-Model parameters such as neutrino mass ordering in the next generation of neutrino oscillation experiments, making independent NSI measurements valuable to the success of those searches. The COHERENT experiment with its suite of detectors containing germanium, sodium, cesium, iodine, argon (and, potentially, other) nuclei provides a unique opportunity to significantly reduce the NSI parameter space not yet excluded by other experiments. This work presents the current status and the potential of NSI studies using the COHERENT data. [Preview Abstract] |
Saturday, April 14, 2018 4:18PM - 4:30PM |
D08.00005: Towards a comprehensive neutrino program: the design and progress of JUNO Yuekun Heng The Jiangmen Underground Neutrino Observatory (JUNO) in China is a multipurpose neutrino experiment designed to determine neutrino mass hierarchy and to measure precisely the oscillation parameters by detecting reactor neutrinos from nuclear power plants, to observe supernova neutrinos, to study the atmospheric, solar neutrinos and geo-neutrinos, and to perform exotic searches. Besides the rich physics, the design and research progresses of JUNO will be covered including the central detector, high detection-efficiency PMTs, transparent liquid scintillator (LS), calibration, muon veto system, etc. The central detector has 20 kt of LS as the target mass. The LS is contained by an acrylic sphere with the diameter of 35.4 m, which is supported by the stainless steel latticed shell, holding 18,000 20'' PMTs and 25,000 3'' PMTs to detect the photons from LS. The central detector is surrounded by pure water to shield the external background radiation, and to serve as medium for the muon Cherenkov veto. A muon tracker detector is additionally placed on the top of the central detector. The JUNO international collaboration was formed in 2015 and is currently composed from over 70 institutions and about 550 collaborators. JUNO plans to begin to take data in 2020. [Preview Abstract] |
Saturday, April 14, 2018 4:30PM - 4:42PM |
D08.00006: Searching for 1$+$3 Sterile Neutrinos with IceCube Timothy Watson, Benjamin Jones Located at the South Pole, the IceCube neutrino observatory consists of a gigaton scale ice-Cherenkov neutrino detector instrumented with 5,160 digital optical modules providing sensitivity to neutrino events with energies ranging from the few GeV to several PeV scale. Within this range, IceCube's exceptional sensitivity to the matter-resonant depletion of the anti-muon neutrino flux in atmospheric neutrinos has led to the world-leading limits on the existence of sterile neutrinos consistent with the 3$+$1 model. Here I present the results of our latest sterile neutrino search applied to the 1$+$3 hypothesis with 1 year of IC86 data. [Preview Abstract] |
Saturday, April 14, 2018 4:42PM - 4:54PM |
D08.00007: Nucleon axial current form factors in a light-front quark model with a pion cloud Xilin Zhang, Gerald A. Miller, Timothy Hobbs Improving modeling of neutrino--nucleus interactions in the GeV energy range has critical importance to the success of next generation neutrino oscillation experiments. One key ingredient in the modeling is nucleon axial current form factors, which however have not been satisfactorily understood. In most studies, both form factors have been assumed to be proportional to a dipole form with one single tunable parameter, known as axial mass (or radius). However, such dipole parameterization has not been (un)justified based on any microscopic model. In this talk, I will present our recent study of these form factors based on a light-front quark model with a pion cloud included. The model is constrained by the data on nucleon EM form factors. I will also discuss our results’ impact on modeling neutrino—nucleus scattering. [Preview Abstract] |
Saturday, April 14, 2018 4:54PM - 5:06PM |
D08.00008: Neutrino Interferometry for High-Precision Tests of Lorentz Symmetry with IceCube Ali Kheirandish Lorentz symmetry is a fundamental symmetry for both the Standard model and General Relativity. However, very small violation of this symmetry is allowed in unifying theories. The IceCube Neutrino Observatory has transformed a cubic kilometer of Antarctic ice into a neutrino telescope and has measured and characterized the atmospheric and astrophysical neutrino fluxes. We have used the observed atmospheric neutrinos in IceCube to search for violation of Lorentz and CPT invariance in the context of Standard Model Extension (SME). As we did not find any evidence of Lorentz violation, we present the best constraints, to date, on the neutrino sector. [Preview Abstract] |
Saturday, April 14, 2018 5:06PM - 5:18PM |
D08.00009: Atmospheric Tau Neutrino Appearance Analysis with IceCube/DeepCore Feifei Huang DeepCore is the low-energy subarray of the IceCube Neutrino Observatory at the South Pole, and provides sensitivity in the neutrino energy range above roughly 10 GeV, where Earth-crossing neutrinos experience oscillations. These neutrinos are muon and electron neutrinos produced in Earth's atmosphere via decays of particles from interactions between cosmic rays and the atmosphere. While tau neutrino interactions in DeepCore cannot be distinguished from those of electron neutrinos at these energies, a statistical separation of these two event classes can be made based on the reconstructed energy and zenith distribution. Therefore, tau neutrino appearance, mainly from muon neutrino to tau neutrino oscillations, can be measured with high significance using IceCube/DeepCore data. We present preliminary results of a tau neutrino appearance analysis using several years of IceCube/DeepCore data. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700