Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session D14: Minisymposium: Fundamental Symmetries II - Muon, Others |
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Chair: Peter Kammel, University of Washington Room: Hilton Waikoloa Village Kohala 4 |
Wednesday, November 29, 2023 9:00AM - 9:15AM |
D14.00001: Unphysical topological charge of nonabelian gauge theory Nodoka Yamanaka We show that the topological charge of nonabelian gauge theory is not observable, which leads to the resolution of the Strong CP problem [1]. We then inspect the phenomenological consequences to particle physics. The most notable implication is the prohibition of the 't Hooft vertex and the sphaleron induced baryogenesis [2]. |
Wednesday, November 29, 2023 9:15AM - 9:30AM |
D14.00002: Testing time reversal symmetry with muon EDM at J-PARC Tsutomu Mibe Physics of lepton dipole moment is receiving great attentions after the results of the muon g-2 experiment at Fermi National Laboratory indicated the measured value of muon g-2 was larger than that from the standard model of particle physics. Upcoming experiments as well as theoretical research are supposed to provide crucial information if this anomaly is owing to new physics beyond the standard model of particle physics. A new experiment is under preparation at J-PARC to measure muon g-2 as well as EDM with novel muon beam by using muon cooling followed by acceleration with LINAC. The experiment aims to reach the sensitivity of muon EDM down to a 10-21 ecm level, offering a stringent test of time reversal symmetry in the second generation lepton. In this contribution, status and prospects of the experiment will be presented. |
Wednesday, November 29, 2023 9:30AM - 9:45AM |
D14.00003: Rabi-Oscillation Spectroscopy of the Hyperfine Structure of the Muonium Atom for Fundamental Physics Hiroyuki A Torii, Shoichiro Nishimura, Koichiro Shimomura Muonium (Mu) is a hydrogenlike atom comprising a positive muon and an electron, both pointlike leptons. Spectroscopy of Mu is a promising method in the search for new physics in particle-physics research. Microwave spectroscopy of the Mu hyperfine structure (HFS) gives a test of QED and provides the most precise estimation of the magnetic moment and the mass of the muon. |
Wednesday, November 29, 2023 9:45AM - 10:00AM |
D14.00004: New Muonic Helium Atom HFS Measurements at J-PARC MUSE Yu Goto, Seiso Fukumura, Patrick Strasser, Takashi Ino, Ryoto Iwai, Sohtaro Kanda, Shiori Kawamura, Masaaki Kitaguchi, Shoichiro Nishimura, Takayuki Oku, Takuya Okudaira, Hirohiko M Shimizu, Koichiro Shimomura, Hiroki Tada, Hiroyuki Torii
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Wednesday, November 29, 2023 10:00AM - 10:15AM |
D14.00005: Proposal to search for the edm of the proton in a storage ring at the "magic momentuim" = 0.7 GeV/c. William M Morse, On Kim Proposal to search for the edm of the proton at a storage ring with the "magic momentum" = 0.7 GeV/c.. |
Wednesday, November 29, 2023 10:15AM - 10:30AM |
D14.00006: Fundamental Symmetry Tests via Precision Hydrogen-Antihydrogen Comparisons: ALPHA at CERN and HAICU at TRIUMF Makoto C Fujiwara, Andrea Capra Precision comparisons between hydrogen and antihydrogen atoms present significant opportunities to test fundamental symmetries and principles in nature, such as CPT invariance and the Weak Equivalence Principle. Over the past two decades, experiments at CERN's Antiproton Decelerator facility have made notable progress. Particularly, the ALPHA (Antihydrogen Laser PHysics Apparatus) experiment has developed techniques for confining antihydrogen atoms and studying their spectroscopic properties in a magnetic "bottle". In recent years, our team has been working on a new project called ALPHA-g, which aims to investigate the gravitational behavior of antimatter by “dropping” antihydrogen atoms. Additionally, we have initiated an ambitious project at TRIUMF, named HAICU (Hydrogen-Antihydrogen Infrastructure at Canadian Universities), with the objective of employing precision quantum sensing techniques, including atomic fountains and atom interferometers, to study antimatter atoms. In this talk, we will provide an overview of the current status of the ALPHA project at CERN and discuss the future opportunities associated with HAICU, which is currently under development at TRIUMF. |
Wednesday, November 29, 2023 10:30AM - 10:45AM |
D14.00007: The Status of the HAYSTAC Dark Matter Axion Search and Phase IIc Results Heather Jackson The axion emerged as a leading candidate for dark matter as well as the most natural solution to the Strong CP problem. The Haloscope at Yale Sensitive To Axion Cold Dark Matter (HAYSTAC) was designed as both a data pathfinder for the 4-12 GHz range and an innovation test-bed for new technologies in searching for the axion. The experiment uses a tunable microwave cavity in a strong magnetic field to search for an axion-induced power excess. HAYSTAC continues to circumvent the standard quantum limit by employing a squeezed-state receiver, the first and only such quantum enhancement scheme for an ultralight dark matter search, resulting in a factor of two improvement in scan rate. The analysis and results from the recently completed Phase IIc run for the 18.78-19.46 μeV/c2 mass range will be presented. |
Wednesday, November 29, 2023 10:45AM - 11:00AM |
D14.00008: Room Temperature Test of the Full Scale Cryogenic Cavallo High Voltage Multiplier for nEDM@SNS Theresa A Sandborn, Steven M Clayton, Isaac Smythe, Marie A Blatnik, Jason Surbrook The SNS nEDM experiment, a search for an electric dipole moment of the neutron to be conducted at the Oak Ridge National Laboratory Spallation Neutron Source, will employ a strong electric field across measurement cells immersed in superfluid helium-4 at 400 mK. The voltage required on a central electrode is about 650 kV. Direct supply of such a voltage from a room temperature power supply into the sub-1 Kelvin environment would be very difficult in terms of cryogenic compatibility, so this experiment aims to use concepts from 18th century Cavallo's Multiplier to amplify a moderate supply voltage up to a sufficient level. A cryogenic Cavallo high voltage amplifier is being developed at Los Alamos National Laboratory for use in the SNS nEDM experiment. In this talk, results from testing this apparatus at room-temperature, prior to its installation in a cryostat for low temperature testing, will be presented. |
Wednesday, November 29, 2023 11:00AM - 11:15AM |
D14.00009: Status of the preparation for the cryogenic test of the full scale cryogenic high voltage multiplier for nEDM@SNS Jason Surbrook, Takeyasu M Ito, Steven M Clayton, Nguyen S Phan, Christopher M O'Shaughnessy, Marie A Blatnik, Eric L Renner, Wade Uhrich, Terrance J Schaub, Isaac Smythe, Theresa A Sandborn A finite measurement of the neutron’s electric dipole moment (nEDM) would have substantial bearing on the standard model of particle physics and many beyond standard model theories. The nEDM@SNS experiment, to be conducted at the Spallation Neutron Source at Oak Ridge National Laboratory, will search for the nEDM in neutrons held in a superfluid helium volume and is anticipated to yield nearly two orders of magnitude increase in sensitivity over completed experiments. The high voltage system relies on multiplication of a moderate high voltage to ~650 kV, internal to the sub-Kelvin volume, by the principle of Cavallo’s voltage multiplier. This talk will present work at Los Alamos National Laboratory to prepare the test cryostat and diagnostics for the Cavallo voltage multiplier apparatus and our plans to demonstrate 1.5K cryogenic operation of the high voltage source for nEDM@SNS. |
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