Kyushu University Academic Staff Educational and Research Activities Database
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Emiko Hiyama Last modified date:2020.02.05

Graduate School
Undergraduate School
Other Organization
Administration Post

Academic Degree
Country of degree conferring institution (Overseas)
Field of Specialization
Nuclear Theory
Total Priod of education and research career in the foreign country
Outline Activities
I am studying structure of nuclei and hypernuclei which include nuclei and hyperons from view point of few-body problem.
Research Interests
  • study of nuclear structure from view point of few-body problem
    keyword : few-body problem, hypernuclei, baryon
Current and Past Project
  • we study the structure of pentaquark system of udscc-bar within the framework of consistuent quark model and we discuss the existence of resonant state of this system.
Academic Activities
1. Emiko Hiyama and Kazuma Nakazawa, Structre of S=-2 hypernuclei and Hyperon-Hyperon Interaction, Annual Review of Nuclear and Particle Science,, 68, 131-190, 2018.06, We review recent progress in $S=-2$ hypernuclei such as double $\Lambda$
hypernuclei and $\Xi$ hypernucei, which are composed of a nucleus and one or two
hyperons such as a $\Lambda$ or a $\Xi$ particle.
By observation of $^6_{\Lambda \Lambda}$He, as the NAGARA event,
we obtain important information on the $\Lambda \Lambda$ interaction.
Using this information, we perform a four-body calculation of
$\alpha \alpha \Lambda \Lambda$ for $^{10}_{\Lambda \Lambda}$Be which
was observed at the KEK experiment as the DEMACHI-YANAGI event.
We interpret this event to be the $2^+$ excited state.
Energy levels of $^{11}_{\Lambda \Lambda}$Be are calculated within
the framework of an $\alpha \alpha n \Lambda \Lambda$ five-
body cluster model. Then, we interpret the HIDA event which was
observed in the KEK experiment to be
an observation of the ground state of $^{11}_{\Lambda \Lambda}$Be.
Motivated by observation of the KISO event of $^{15}_{\Xi^-}$C,
with use of SHF and RMF, we calculate the energy spectra of this hypernucleus.
We interpret this event as the $^{14}{\rm N(g.s.)}+\Xi^-(0p)$ state.
Finally We propose to perform an experiment of
$^7{\rm Li}(K^-,K^+)^7_{\Xi^-}$H and $^{10}{\rm B}(K^-,K^+)^{10}_{\Xi^-}$Li
in order to extract information about the spin- and isospin-averaged
part of $\Xi N$ interaction..
Membership in Academic Society
  • Japan Physics Society
  • ΛN spin-orbit splittings in 9ΛBe and 13ΛC studied with one-boson exchange ΛN interactions
  • Establishment of accurate calculation Method of quantum few-body problem and it application
Educational Activities
quantum mechanics (Undergraduate second)
Other Educational Activities
  • 2018.06, July 2-4th, Intensive lectures for nuclear physics at Nankai Univeristy (China).