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 3WKA: Spectroscopy of Hyperons and Heavy Baryons at JLab and J-PARC IInvited Workshop
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Chair: Hiroyuki Noumi Room: Hilton Waikoloa Village Kohala 3 |
Monday, November 27, 2023 9:00AM - 9:30AM |
3WKA.00001: Hyperon spectroscopy Invited Speaker: Elena Santopinto Theoretical results with both the three quark and quark diquark models will be presented and critically discussed. Some of those theoretical results could be useful for Jlab and J-PARC experimental programs. |
Monday, November 27, 2023 9:30AM - 10:00AM |
3WKA.00002: Hyperon Beams in Modern Baryon Spectroscopy Invited Speaker: John W Price The use of multiple diverse incident particle probes is vital for our understanding of baryon spectroscopy, since each unique probe provides a different aspect of the particle being studied. Commonly used primary beams include protons and electrons; secondary beams produced from these include photons, pions, and kaons. The use of other probes is limited by our ability to determine both the beam flux and the effective target thickness. The primary beam flux is typically measured by the accelerator, while the geometric length of the target can be easily measured; secondary beam flux is measured by the experimenter. Short-lived beam particles, like the Λ or KS, provide additional information that cannot be obtained in any other way, but determination of the beam flux and the target thickness is much more complicated; bubble chamber experiments measured these quantities directly. In modern large-acceptance detectors, the beam particle is not detected, but is inferred using the final-state particles. With significantly higher data rates, they can compete with bubble chambers. A recent CLAS publication used this technique to study the process Λp→Λp. The scattered Λ was inferred via its decay to π-p, and event selection compared the missing mass mX in Xp→Λp to the known Λ mass mΛ=1.115 GeV. The process γp→K+Λ was used to verify the beam Λ, and detection of the K+ in missing mass was required. The number of detected events exceeded all previous measurements for this process. Inclusively produced beams, as in γp→ΛX, can increase greatly both the overall flux and the momentum range of the beam Λ. The CSUDH Hadronic Structure Laboratory is testing this technique using the process pp→pp, where the beam proton comes from γp→pX. In parallel, we are revisiting Λp→Λp using a different CLAS dataset, as well as K0p→KSp. This talk will present the motivations for the development of short-lived beams, the present status of this project with the CLAS Collaboration, and place it in context with other, similar projects. |
Monday, November 27, 2023 10:00AM - 10:30AM |
3WKA.00003: The K-long Facility at JLab. Invited Speaker: Igor Strakovsky In this talk I will describe the K-long Facility at Jefferson Laboratory approved to run for strange hadron spectroscopy. This incudes the possibility to observe dozens of hyperons and strange mesons predicted by LQCD and CQM but not yet observed. |
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