HYP HRS-HKS

Hypernuclear Project with HRS-HKS

Experiments

Approved

• E12-19-002 (^{3, 4}_ΛH), A, 14.5 PAC days
• E12-15-008 (^{40, 48}_ΛK), A, 28 PAC days
• E12-20-013 (²⁰⁸_ΛTl), B⁺, 20 PAC days

Conditionally Approved

• C12-20-003 (³_Λn)

Overview

The experiment is planned to be done with high resolution spectrometers HRS and HKS in JLab Hall A for high precision hypernuclear measurement. Electron beams at 4.24 GeV will be impinged on various targets (^{3, 4}He, ^{40, 48}Ca, ²⁰⁸Pb), and scattered electrons and K⁺s from the (e,e'K⁺) reaction will be detected by the spectrometers for missing mass spectroscopy.

Documents

DAQ

• FPGA

Theses

• 2021
  • Katayama_Thesis2020.pdf:
    K. Katayama, "Development of HRS-HKS trigger system with FPGA -High precision measurement of hypernuclei at JLab-",
    Master's Thesis, Kyoto University, Mar 2021 (in Japanese).
  • Toyoda_Thesis2020.pdf:
    T. Toyoda, "Basic design of gas target for high accuracy mass measurement of hypertriton at JLab",
    Master's Thesis, Kyoto University, Mar 2021 (in Japanese).
  • T. Akiyama, "",
    Master's Thesis, Tohoku University, Mar 2021 (in Japanese).
  • K. Okuyama, "",
    Master's Thesis, Tohoku University, Mar 2021 (in Japanese).

Meetings

• Weekly Meeting etc.
• Strategy Meeting
• Collaboration Meeting

Publications

• T. Gogami et al., "Accurate Λ hypernuclear spectroscopy with electromagnetic probe at Jefferson Lab", AIP Conference Proceedings 2319, 080019 (2021) [1]

Presentations

2021

Hall A/C Collaboration Meeting (Online, Jul 8-9, 2021)

• T. Gogami, "High accuracy measurement of nuclear masses of hyperhydrogens (C12-19-002)", Jul 9, 2021
  → https://indico.jlab.org/event/451/

JPS Annual Meeting (Online, 12-15 Mar, 2021)

• K.N. Suzuki, "Cross section measurement of the ³H(e,e'K⁺)nnΛ reaction at JLab", Mar 12, 2021 (PDF)
• K. Okuyama
• T. Akiyama
• K. Katayama
• Y.R. Nakamura

HIN2020 (Online+Kyoto(Japan), 8-10 Mar, 2021)

http://www2.yukawa.kyoto-u.ac.jp/~hin2020/

• J. Renhold, "The future hypernuclear program at Jefferson Lab", Mar 10, 2021

APFB2020 (Online+Kanazawa(Japan), 1-5 Mar, 2021)

http://www.rcnp.osaka-u.ac.jp/Divisions/np1-a/apfb2020/

• K. Katayama, "Trigger system development for the accurate B_Λ measurement of Lambda hypertriton at JLab"
• K. Itabashi, "Study of the nnΛ state and Λn interaction at Jefferson Lab"
• T. Gogami, "Lambda hypertriton binding energy measurement at Jefferson Lab", Mar 2, 2021 (PDF)

Hall A Winter Collaboration Meeting (Online, Jan 21-22, 2021)

• B. Pandey, "", Jan 21, 2021
• T. Gogami, "Future hypernuclear experiments with HKS", Jan 22, 2021 (PDF)