Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session K13: Neutrino Astronomy II |
Hide Abstracts |
Sponsoring Units: DAP Chair: Mahdi Bagheri, Georgia Institute of Technology Room: Marquette IV - 2nd Floor |
Sunday, April 16, 2023 3:45PM - 3:57PM |
K13.00001: The Status of the Radio Neutrino Observatory in Greenland Stephanie A Wissel Neutrinos are the ideal messenger for high-energy astrophysics. Weakly interacting and uncharged, they propagate undeterred and unabsorbed through the universe. Embedded radio experiments can detect the coherent radio emission from neutrino interactions in ice using a sparse array of detectors to build enormous neutrino target volumes at the highest energies (> PeV scale). Currently under construction at the NSF-run Summit Station in Greenland, the Radio Neutrino Observatory in Greenland (RNO-G) consists of 35 autonomous stations that will comprise the first neutrino telescope with access to the Northern sky at the highest energies. Each station includes a deep component deployed with a phased array trigger and a surface component for event characterization and cosmic ray identification. We will present the status of the instrument and its construction and its connection as a testbed for the radio array for IceCube-Gen2. |
Sunday, April 16, 2023 3:57PM - 4:09PM |
K13.00002: Calibration of the Radio Neutrino Observatory in Greenland Bryan Hendricks The Radio Neutrino Observatory in Greenland (RNO-G) aims to detect ultra-high energy (UHE) neutrinos in the PeV to EeV energy range through the detection of coherent Cherenkov emission produced via the Askaryan effect. The coherence increases in the radio regime, allowing for immense detector volumes due to the long attenuation length of radio waves in ice. Currently, seven stations are installed and operating at the NSF's Summit Station in Greenland. When completed, the detector will consist of 35 independent stations spaced roughly 1 km apart which each contain both high gain, shallow in-ice antennas and multiple strings of intermediate-to-deep, omnidirectional, low-gain in-ice antennas to detect the radio emissions. We will present the calibration of the geometry of the stations and implications for the instrument performance, with a special attention to the resolution on reconstructing the arrival direction of the radio signals. |
Sunday, April 16, 2023 4:09PM - 4:21PM |
K13.00003: Towards Radio Searches for the Highest-Energy Tau Neutrinos with BEACON Andrew J Zeolla When ultrahigh energy tau neutrinos skim the Earth, the tau leptons they produce can exit the Earth and produce extensive air showers in the atmosphere. The Beamforming Elevated Array for COsmic Neutrinos (BEACON) is a novel detector concept consisting of many radio interferometers placed on mountaintops, designed to detect the radio emission of these upgoing extensive air showers. The prototype is located at the White Mountain Research Station in California and consists of a phased array of 4 custom crossed-dipole antennas with a 30-80 MHz bandwidth. A goal of the prototype is the detection of cosmic rays, whose well known flux will allow us to estimate the sensitivity of a full-size BEACON to ultrahigh energy neutrinos. In this talk, we discuss the current status of the BEACON prototype, a recent calibration campaign using a drone, and the ongoing cosmic ray search. |
Sunday, April 16, 2023 4:21PM - 4:33PM |
K13.00004: Simulation Analysis of Coincident Events in ARA and IceCube Alan Salcedo, Alexander Machtay, Amy L Connolly The Askaryan Radio Array (ARA) is an experiment aiming to detect ultra-high energy (>10 PeV) neutrinos at the South Pole. ARA has five stations of antennas designed to detect radio-frecuency radiation emitted from relativistic particle showers produced by neutrinos interacting within the ice. IceCube is a cubic-kilometer detector, a few kilometers away from ARA, with the target of detecting high-energy neutrinos (up to 10 PeV). IceCube uses arrays of photomultiplier tubes to record optical signals of Cherenkov radiation emitted by moving charged leptons also produced by neutrinos interacting in ice. Since IceCube has measured neutrinos up to a few PeV, ARA can also search for radio emission from some of the same neutrino interactions. A detection by ARA coincident with an event reported by IceCube would be the first definitive detection of a neutrino with the radio technique and it would come with a confirmation that it came from a neutrino interaction. In this talk, I will present a simulation analysis of neutrino coincident detection by IceCube and ARA. |
Sunday, April 16, 2023 4:33PM - 4:45PM |
K13.00005: Machine Learning Application In Data Analysis In The Askaryan Radio Array Experiment Chao-Hsuan Liu, Ilya Kravchenko Askaryan Radio Array (ARA) is an ultra-high energy neutrino detection experiment that has been collecting data at the South Pole Station in Antarctica for a decade. To increase sensitivity to neutrino events, ARA is collecting high data volumes at low thresholds, and consequently its data set is dominated by background events such as thermal noise or noise from anthropogenic events. In this contribution, we build Machine Learning classification tools that are capable of discriminating background events from the expected neutrino candidates at the level of 1:10,000 or better. The methods employed to train event classifiers include Convolutional Neural Networks, Deep Neural Networks, and Boosted Decision Trees, with the inputs being images constructed from the event records. The classifiers are trained on background-dominated samples of real data and simulated neutrino candidates. The performance of these methods including the signal detection efficiencies, background rejections, and receiver operating characteristic curves is presented, with the comparison of the methods discussed. |
Sunday, April 16, 2023 4:45PM - 4:57PM |
K13.00006: Polarization Reconstruction of Askaryan Emission of Ultra-High Energy Neutrinos Using the Askaryan Radio Array Justin C Flaherty The Askaryan Radio Array (ARA) is an ultra-high energy (> 10 PeV) neutrino detector buried beneath the ice at the South Pole. It consists of five stations of antennas that are designed to detect radiation emitted by relativistic particle showers that are byproducts of neutrino interactions within the ice, which generate a cone of Cherenkov radiation in the radio regime (known as Askaryan radiation). This radiation is polarized normal to the surface of the cone, which we can use to identify the neutrino vertex. Using the polarization direction and vertex location, we can then reconstruct the neutrino trajectory. In this talk, I will show our measured resolution on our polarization reconstruction. |
Sunday, April 16, 2023 4:57PM - 5:09PM |
K13.00007: New architecture of the trigger system in the evolution of the Askaryan Radio Experiment DAQ towards ARA-Next Pawan Giri, Ilya Kravchenko, Amy L Connolly, Patrick Allison With the IceCube detection of ultra-high energy cosmic neutrino (UHE) flux and identification of two neutrino sources by IceCube, the field of experimental astrophysics has entered a new era. The Askaryan Radio Array (ARA) experiment seeks to detect UHE neutrinos beyond the reach of IceCube (>10 PeV) employing the radio detection technique that is a most sensitive method to register neutrinos with energies above 1017 eV. To extend ARA’s scientific capabilities, a new DAQ based on RFSoC (Radio Frequency System on a Chip) is under development. This new DAQ will allow us to do more sophisticated calculations at trigger level, providing more freedom to define triggers, including multi-channel triggers such as those in use at collider experiments for decades. We plan to develop, simulate, and implement the most promising triggers in the new ARA DAQ. This includes defining triggers for double pulses from possible in-ice neutrino interactions, using templates for signals from cosmic ray interactions in the air, finding triggers for events coincident in both ARA and IceCube, optimizing triggers for neutrinos from the direction of known astrophysical sources, tagging or rejecting events from known anthropogenic sources using directional information and many more. These new trigger concepts are expected to lower the trigger thresholds and increase the sensitivity of the ARA detector. |
Sunday, April 16, 2023 5:09PM - 5:21PM |
K13.00008: Neutrino event topology generated by NuLeptonSim as seen in the Askaryan Radio Array Ryan J Krebs, Abigail R Bishop, Austin Cummings, William Luszczak Energetic (>10 PeV) neutrinos provide a unique window into the most violent astronomical events in the universe, traveling without interactions and pointing directly back to their sources. To develop and refine the observation strategies of high energy neutrino detectors, neutrino propagation through the Earth must be well understood. NuLeptonSim is a Monte-Carlo simulation aimed to study the various effects of interactions that occur as neutrinos and their respective secondaries propagate inside the Earth. The simulation framework began with NuTauSim and has been updated to include stochastic modeling of radiative energy losses of charged leptons and the production and propagation of muons and muon neutrons.. NuLeptonSim was used as the event generator for both primary neutrino interactions and secondary events within a detector simulation of the Askaryan Radio Array, an in-ice radio detector. The results of this simulation show consistency with previous studies regarding sensitivity to primary neutrinos interactions and demonstrate improved neutrino sensitivity when including detection of secondaries. Furthermore, observed secondaries often produce event topologies in which multiple interactions can be observed along the neutrino trajectory, increasing chances of detection in addition to providing a potential method of flavor discrimination. |
Sunday, April 16, 2023 5:21PM - 5:33PM |
K13.00009: IceCube search for neutrino-induced cascades from gravitational wave sources Samuel Hori, Jessie Thwaites, Justin Vandenbroucke, Aswathi Balagopal V., Abhishek Desai Some models predict an associated neutrino signal from compact object mergers in addition to the observed gravitational waves. Previous searches have set upper limits on the neutrino flux from mergers, but no significant detection has been reported. The LIGO-Virgo Collaboration (LVC) has released archival data for 3 operating runs with 91 total events detected. A new IceCube Neutrino Observatory dataset has been developed with all-flavor cascade-type events with reduced angular uncertainty and improved sensitivity in the southern hemisphere. We discuss an ongoing neutrino-gravitational wave coincidence study using the improved IceCube dataset and archival data from past LVC runs. |
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