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 CE: Mini-symposium on Strangeness Nuclear Physics Today and Tomorrow I
7:00 PM–9:30 PM,
Wednesday, October 24, 2018
Hilton Room: King's 1
Chair: Akira Ohnishi, Yukawa Institute for Theoretical Physics
Abstract ID: BAPS.2018.HAW.CE.6
Abstract: CE.00006 : High-accuracy BΛ measurement of light hypernuclei in nuclear emulsion (1)*
8:30 PM–8:45 PM
(Advanced Science Research Center, JAEA)
Measurement of charge symmetry breaking effect in hypernuclei is an important probe for the strangeness physics. Nuclear emulsion has an essential role to determine Λ binding energy (BΛ) of light hypernuclei, because we can measure the BΛ which have various mass numbers, atomic numbers and decay modes in the same emulsion plate.
In recent years, measurements by counters have been advanced. The energy-level spacing and the ground state binding energy were obtained, but the differences from the past emulsion studies are left. A large error of BΛ of hypernuclei with A≥9 is due to less event number.
We are performing the latest emulsion experiment, J-PARC E07. A huge number of light single hypernuclei, which is mainly produced by kaon-nucleus direct process, will be extracted from the “overall” analysis. A current analysis of small parts predicts that the ~106 of hypernuclei mesonic-like events are recorded, which is one order of higher than the past experiments. The high-accuracy BΛ measurement will be achieved with the new events.
We will report the results of single hypernuclei candidates found in E07 emulsion plates and discuss the systematic error of the measurement with the advanced energy calibration method.
*The work was supported by JSPS KAKENHI Grant No. 16H0218.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.CE.6
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