Bulletin of the American Physical Society
Fall 2022 Meeting of the APS Division of Nuclear Physics
Volume 67, Number 17
Thursday–Sunday, October 27–30, 2022; Time Zone: Central Daylight Time, USA; New Orleans, Louisiana
Session KJ: Mini-Symposium: Light Meson Decays II |
Hide Abstracts |
Chair: Susan Schadmand, GSI Helmholtzzentrum fur Schwerionenfors Room: Hyatt Regency Hotel Imperial 11 |
Saturday, October 29, 2022 10:30AM - 11:06AM |
KJ.00001: The Experimental Programs on Light Pseudoscalar Meson Decays Invited Speaker: Simon Taylor The decays of the low-lying pseudoscalar mesons (π0, η, and η′) allow access to a plethora of physics probes, from |
Saturday, October 29, 2022 11:06AM - 11:18AM |
KJ.00002: Measurement of η→π0γγ decay in KLOE experiment Marcin Berlowski The latest results from KLOE collaboration on five photon final state, which is used to study the η→π0γγ decay will be presented. |
Saturday, October 29, 2022 11:18AM - 11:30AM |
KJ.00003: CP-violating new physics in η decays: implications from the SMEFT Pablo Sanchez-Puertas Forbidden (or highly-suppressed) processes, such as CP violating signatures in the flavor-neutral sector, offer unique opportunities to search for physics beyond the standard model. |
Saturday, October 29, 2022 11:30AM - 11:42AM |
KJ.00004: Improved Standard-Model Prediction for π0 → e+ e-and Constraints on BSM Physics Bai-Long Hoid, Martin Hoferichter, Bastian Kubis, Jan Lüdtke We present the recent work on an improved Standard-Model prediction for the rare decay π0 → e+ e-, which plays a crucial role in the test of the long-distance dynamics of the strong interaction. The reduced amplitude of the decay is determined by the pion transition form factor for π0 → γ*γ*, for which we employ a dispersive representation that incorporates both time-like and space-like data as well as short-distance constraints. The resulting SM branching fraction, Br[π0 → Y*Y*]=6.25(3)×10-8, reveals a ten-fold improvement in precision over experiment and sharpens constraints on physics beyond the Standard Model. |
Saturday, October 29, 2022 11:42AM - 11:54AM |
KJ.00005: The DarkLight experiment at ARIEL (TRIUMF) Michael Kohl, Jan C Bernauer, Ross Corliss The DarkLight experiment was conceived to search for a dark photon produced in electron scattering, motivated by theory, astrophysical observations, and observed anomalies in particle physics such as the deviation of the muon anomalous magnetic moment from the Standard Model. Of particular interest is the mass window below 20 MeV, favored by an observed excess of dilepton production from nuclei known as the Be-8 anomaly, which has been explained with a fine-tuned boson representing a fifth force. The new DarkLight project has been proposed to use the 30-50 MeV electron beam of the ARIEL facility at TRIUMF on a Tantalum target along with a high-resolution apparatus to detect the e+e- pair, to probe the continuous e+e- invariant mass spectrum from 10-20 MeV for narrow structures and to provide an independent test of the fifth-force postulation. The experiment design, sensitivity, implementation strategy, and current status will be reported. |
Saturday, October 29, 2022 11:54AM - 12:06PM |
KJ.00006: The simulation of DarkLight experiment at ARIEL (TRIUMF) Chenxi Ma The DarkLight experiment aims to search for a new boson in the dark sector via electron scattering from a heavy target for evidence of new physics. Of particular interest is the mass range between 10 to 20MeV, motivated by anomalies resulting from excess of dilepton production from Be-8 and He-4. The experiment has been proposed to use the 30-50MeV beam of the ARIEL facility at TRIUMF on a Tantalum target along with two magnetic spectrometers to detect the e+e- pair. In the talk, I will discuss the simulations for the magnetic and detector system in GEANT4, and the generators used to estimate signal, irreducible and random coincidence background. |
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