Overview of the hypernuclear production in heavy-ion collision experiments

Rappold, C.

doi:10.1088/1742-6596/668/1/012025

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…After the discovery, the binding energies of the Λ-hyperon, i.e., the Λ separation energy, were studied with the nuclear emulsion technique and K − meson beams at CERN [2,3]. Recently, experimental techniques with realtime particle counters using secondary meson-and primary electron-beams as well as heavy ion beams have been established and are employed for studying the binding energies, structure, and lifetimes of hypernuclei [4][5][6]. However, the emulsion technique still has a great advantage in measuring the binding energy of light hypernuclei at the best precision.…”

Section: Introductionmentioning

confidence: 99%

Precise measurement on the binding energy of hypertriton from the nuclear emulsion data using analysis with machine learning

Kasagi

Liu²,

Nakagawa³

et al. 2022

Supl. Rev. Mex. Fis.

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A machine learning model has been developed to search events of production and decay of a hypertriton in nuclear emulsion data, which is used for measuring the binding energy of the hypertriton at the best precision. The developed model employs an established technique for object detection and is trained with surrogate images generated by Monte Carlo simulations and image transfer techniques. The first hypertriton event has already been detected with the developed method only with 10−4 of the total emulsion data. It implies that a sufficient number of hypertriton events will soon be detected for the precise measurement of the hypertriton binding energy.

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Section: Introductionmentioning

confidence: 99%

Precise measurement on the binding energy of hypertriton from the nuclear emulsion data using analysis with machine learning

Kasagi

Liu²,

Nakagawa³

et al. 2022

Supl. Rev. Mex. Fis.

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“…One of the famous effects is that the hyperon plays as a gluelike particle: its inclusion leads to an expansion of the proton and neutron driplines, as well as a new emergence of stable nuclei. Recently, one novel type of the hypernuclear experiment combined with the heavy-ion collision has been proposed [4][5][6][7]. An advantage of this new experimental method is an accessibility to the proton-rich and neutron-rich regions, where the inclusion effect can provide a noticeable difference from the normal nuclei.…”

Section: Introductionmentioning

confidence: 99%

One-proton emission from the LiΛ6 hypernucleus

Oishi

2018

Phys. Rev. C

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One-proton (1p) radioactive emission under the influence of the Λ 0 -hyperon inclusion is discussed. I investigate the hyper-1p emitter, 6 Λ Li, with a time-dependent three-body model. Two-body interactions for α-proton and α-Λ 0 subsystems are determined consistently to their resonant and bound energies, respectively. For a proton-Λ 0 subsystem, a contact interaction, which can be linked to the vacuum-scattering length of the proton-Λ 0 scattering, is employed. A noticeable sensitivity of the 1p-emission observables to the scattering length of the proton-Λ 0 interaction is shown. The Λ 0 -hyperon inclusion leads to a remarkable fall of the 1p-resonance energy and width from the hyperon-less α-proton resonance. For some empirical values of the proton-Λ 0 scattering length, the 1p-resonance width is suggested to be of the order of 0.1 − 0.01 MeV. Thus, the 1p emission from 6 Λ Li may occur in the timescale of 10 −20 − 10 −21 seconds, which is sufficiently shorter than the selfdecay lifetime of Λ 0 , 10 −10 seconds. By taking the spin-dependence of the proton-Λ 0 interaction into account, a remarkable split of the J π = 1 − and 2 − 1p-resonance states is predicted. It is also suggested that, if the spin-singlet proton-Λ 0 interaction is sufficiently attractive, the 1p emission from the 1 − ground state is forbidden. From these results, I conclude that the 1p emission can be a suitable phenomenon to investigate the basic properties of the hypernuclear interaction, for which a direct measurement is still difficult.PACS numbers: 21.10. Tg, 21.80.+a, 23.50.+z, 27.20.+n. 6 Λ Li, is presented. There, my result and discussion on the hyperon-inclusion effect on the 1p emission are described arXiv:1802.04811v1 [nucl-th]

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