Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session DE: Mini-symposium on Strangeness Nuclear Physics Today and Tomorrow II
9:00 AM–11:30 AM,
Thursday, October 25, 2018
Hilton Room: King's 1
Chair: Hirokazu Tamura, Tohoku University
Abstract ID: BAPS.2018.HAW.DE.2
Abstract: DE.00002 : Status of Λn interaction study via the final state interaction effect in γ+d->K++Λ+n production*
9:15 AM–9:30 AM
The study of Baryon interaction including strangeness have been mainly carried by Hypernuclear experiment, because of difficulties of the Hyperon-Nucleon (YN) scattering. The recent results of 4ΛH and 4ΛHe measurements show existing of a charge symmetry breaking (CSB) in ΛN interaction. It is suggested that the ΛN CSB is due to ΛΣ coupling in ΛN. On the other hand, there is lack of precise data in the Λn interaction. The measurement of Λn interaction is one of the key issues in the strangeness nuclear physics. The Λn interaction can be extracted by comparing cross-sections of γ+d->K++Λ+n and γ+p->K++Λ due to final state effect of Λn.
We have been investigating strangeness photoproduction with tagged photon beam in Research Center for Electron Photon Science (ELPH), Tohoku University. The spectrometer, NKS2, was originally designed for K0 Λ production. Upgrades of NKS2 detectors for the Λn FSI experiment are in progress: high resolution TOF counter by Multi-gap Resistive Plate Chamber and Electron Veto by Aerogel Cherenkov counter.
We will present the plan of experiment with beam time estimation and requirements/achievement of detector performance.
*This work is supported by JSPS Grant-in-Aid for Scientific Research(B) Grant Number 18H01220.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.DE.2
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