TY - GEN
T1 - Status of experiment for ? n interaction measurement via final state interaction in ?d ? K +? n production
AU - Kaneta, Masashi
N1 - Funding Information:
This work is supported by JSPS KAKENHI Grant-in-Aid for Scientific Research (B) 18H01220, JSPS KAKENHI Grant-in-Aid for Scientific Research (A) 17H01121, MEXT KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas 6007 (Research in a Proposed Research Area) 18H05459 and 18H05457, and Japan-Germany Research Cooperative Program JSPS/DAAD PPP, Germany 57345295. .
Publisher Copyright:
© 2021 Author(s).
PY - 2021/2/5
Y1 - 2021/2/5
N2 - Research on nuclear forces between the nucleon and the hyperon has been studied mainly on experiments on measuring the binding energy of hypernuclei. We thought that we understood the hyperon-nucleon force because theoretical models based on experimental data could reproduce many hypernuclear data. However, for recent H?4 (pnn?) and He?4 (ppn?) data, the theoretical ? ? model does not reproduce the binding energies of the ground and excited states. In these two hypernuclei, only p and n are replaced by one, and the expected binding energy is simply expected to be dominant due to the effect of Coulomb force. Experimental data show differences that cannot be explained by the theoretical model and the problem called charge symmetry breaking (CSB) in ?N interaction. The key to solving the problem is to measure ?n forces that have not been measured with good accuracy. To measure the force between ? and n, which cannot perform direct scattering experiments, we are preparing an experiment to measure the K+ production cross-section modified by the ?n final state interaction in the ?d?K+?n reaction. The experiment will be performed with a real photon beamline generated from a 1.3 GeV electron synchrotron in Research Center for Electron Photon Science (ELPH), Tohoku University. In the beamline, we have been conducting K0? production experiments using the NKS2 spectrometer. We are developing a new detector to measure K+, and report on it.
AB - Research on nuclear forces between the nucleon and the hyperon has been studied mainly on experiments on measuring the binding energy of hypernuclei. We thought that we understood the hyperon-nucleon force because theoretical models based on experimental data could reproduce many hypernuclear data. However, for recent H?4 (pnn?) and He?4 (ppn?) data, the theoretical ? ? model does not reproduce the binding energies of the ground and excited states. In these two hypernuclei, only p and n are replaced by one, and the expected binding energy is simply expected to be dominant due to the effect of Coulomb force. Experimental data show differences that cannot be explained by the theoretical model and the problem called charge symmetry breaking (CSB) in ?N interaction. The key to solving the problem is to measure ?n forces that have not been measured with good accuracy. To measure the force between ? and n, which cannot perform direct scattering experiments, we are preparing an experiment to measure the K+ production cross-section modified by the ?n final state interaction in the ?d?K+?n reaction. The experiment will be performed with a real photon beamline generated from a 1.3 GeV electron synchrotron in Research Center for Electron Photon Science (ELPH), Tohoku University. In the beamline, we have been conducting K0? production experiments using the NKS2 spectrometer. We are developing a new detector to measure K+, and report on it.
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U2 - 10.1063/5.0037285
DO - 10.1063/5.0037285
M3 - Conference contribution
AN - SCOPUS:85101006565
T3 - AIP Conference Proceedings
BT - Proceedings of the 14th Asia Pacific Physics Conference
A2 - Tou, Teck-Yong
A2 - Yokoyama, Jun'ichi
A2 - Shukor, Roslan Abdul
A2 - Tanaka, Kazuhiro
A2 - Choi, Hyoung Joon
A2 - Matsumoto, Ryoji
A2 - Chin, Oi-Hoong
A2 - Chin, Jia Hou
A2 - Ratnavelu, Kuru
PB - American Institute of Physics Inc.
T2 - 14th Asia Pacific Physics Conference, APPC 2019
Y2 - 17 November 2019 through 22 November 2019
ER -