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.2
Abstract: CE.00002 : Spectroscopic study of $¥Xi$ hypernucleus by using the $^{12}{¥rm C}(K^{-},K^{+})$ reaction at J-PARC
7:30 PM–7:45 PM
Presenter:
Shunsuke Kanatsuki
(Kyoto University)
Author:
Shunsuke Kanatsuki
(Kyoto University)
First the production rates of $¥Xi^{-}$ were measured through the $p(K^{−},K^{+})$ reaction at 1.5--1.9 GeV/$c$, and found to be maximum at 1.8 GeV/$c$.
Then we irradiated $78.6¥times 10^{9}~K^{-}$s at 1.8 GeV/$c$ on the carbon target to search for a $¥Xi^{-}$ bound state.
An energy resolution was 6 MeV (FWHM) which is the best ever achieved in the past experiments using this reaction.
As the results of the experiment, the hypernuclear spectrum shows a significant excess in the bound region.
The spread of the events is much broader than the energy resolution and expected conversion width of Ξ hypernucleus, and at least two $¥Xi^{-}$ bound states are expected to exist around $B_{¥Xi} = 9$ and 2 MeV.
We will report the result of this experiment and discuss the recent baryon-baryon interaction models.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.CE.2
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