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Résumé |
In recent years, there is a renewed interest in the dibaryons due to
exclusive measurements in hadron reactions as well as the direct
measurement in relativistic heavy-ion collisions. In this talk, we
present the
result of the first principle calculation using lattice QCD.
Particularly we focus on the study for dibaryon candidates involving
with the decuplet baryon: (i) the Delta-Delta system with the heavy
pion mass, and
(ii) the Omega-Omega system with the physical pion mass. Our result of
the Delta-Delta interaction is that in the 7S3 channel, only an
strongly attractive interaction (no repulsive core) appears, which
leads
to a bound state of two-Delta's, the so-called "ABC effect", observed
as a resonance of two-nucleons in experiment by CELSIUS/WASA
Collaboration. The result of the Omega-Omega interaction in the 1S0
channel at physical point shows a shallow bound state, which is
similar to deuteron. |
