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 1WEB: Exploring Excited Nucleons with Meson, Electron, and Photon Beams IIInvited Workshop
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Chair: Hiroyuki Sako Room: Hilton Waikoloa Village Queens 4 |
Sunday, November 26, 2023 11:00AM - 11:30AM |
1WEB.00001: Studies of baryon resonances with meson photoproduction at SPring-8 Invited Speaker: Toshikazu HASHIMOTO Meson photoproduction is a helpful tool for investigating baryon resonances due to many possibilities for meson-baryon combinations in the final-state, such as piN, etaN, omegaN, or multi-meson final states. Additionally, the use of a highly polarized photon beam enables the extraction of spin information of intermediate resonances. |
Sunday, November 26, 2023 11:30AM - 12:00PM |
1WEB.00002: Exposing Nucleon Resonance Structure using Electron and Pion Beams Invited Speaker: Gilberto T Ramalho Contributing to the effort of exploring the connection of the physics associated with electron beams and pion beams, we study the electromagnetic transitions between the nucleon and the nucleon resonances N* in terms of the invariant square momentum transfer q2. The analysis is divided formally into the spacelike region (probed by electron beams) with the determination of the electromagnetic transition form factors, and the timelike region (probed by pion beams) with the calculation of the nucleon resonance Dalitz decay (N* -> e+e- N) rates. |
Sunday, November 26, 2023 12:00PM - 12:30PM |
1WEB.00003: Excited Nucleon Spectroscopy in 3-Body Hadronic Reactions with HypTPC Invited Speaker: Shin Hyung Kim The nucleon resonance (N*) spectrum holds fundamental information about non-perturbative QCD. The precise data on both photoproduction and hadronic reactions are needed in order to separate the overlapping nucleon resonances with large widths using a partial-wave analysis (PWA). The J-PARC E45 was proposed to measure the precise nucleon resonance spectrum in the πN→ππN 3-body hadronic reactions in the wide energy range of 1.5 -- 2.15 GeV. The E45 detector is highlighted by a large-acceptance Superconducting Hyperon Spectrometer, which accommodates a GEM-based time projection chamber (HypTPC). This spectrometer was designed to facilitate a high-precision measurement with a high-rate capability up to 1 MHz beam at J-PARC. In this talk, we will present current preparation status and anticipated results of the E45 experiment. This talk also reviews recent advances of GEM detectors, with a focus on design principles, high-rate capability, and operational experience of HypTPC, and discusses the most promising directions in future applications such as active-target TPCs for stellar nucleosynthesis experiments. |
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