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.7
Abstract: CE.00007 : Study of lifetime for light hypernuclei in J-PARC E07 experiment*
8:45 PM–9:00 PM
(Pro.Nakazawa lab, Physics Department, Gifu University, Japan.)
single-Λ hypernuclear events. In order to investigated the lifetime of Λ in more precisely, it is
necessary to detect many decay events of light hypernuclei (A<5) with π- (mesonic decay)
due to good identification of the nuclide having smaller Q-values than non-mesonic decays
ones. Light hypernuclei may have simple structure with a few nucleons. In the past
experiments, the lifetime of light hypernuclei seems to be shorter than that of free Λ with not
small errors. Therefore, we try to reduce the error by increasing the statistics.
In J-PARC E07 experiment, the K- beam of 1.8 GeV/c was exposed to about 1500 nuclear
emulsion sheets. We search for typical topologies with two vertices of light hypernuclear
candidate events in use of the Vertex Picker (overall scanning system) to scan whole area
of the emulsion. By the current analysis, we can estimate to obtain 10^6 events with
mesonic decay of light hyperniclei.
In this talk, we will report the searching method of light hypernuclei and preliminary results(a few tens events)
of the lifetime of them.
*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.7
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