Status of experiment for ? n interaction measurement via final state interaction in ?d ? K +? n production

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish
Title of host publicationProceedings of the 14th Asia Pacific Physics Conference
EditorsTeck-Yong Tou, Jun'ichi Yokoyama, Roslan Abdul Shukor, Kazuhiro Tanaka, Hyoung Joon Choi, Ryoji Matsumoto, Oi-Hoong Chin, Jia Hou Chin, Kuru Ratnavelu
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735440630
Publication statusPublished - 2021 Feb 5
Externally publishedYes
Event14th Asia Pacific Physics Conference, APPC 2019 - Kuching, Sarawak, Malaysia
Duration: 2019 Nov 172019 Nov 22

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference14th Asia Pacific Physics Conference, APPC 2019
CityKuching, Sarawak

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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