Speaker
Description
"How does QCD build hadrons?" is still an unanswered question in hadron physics. In particular, behaviors of the strong interaction in low energy is an issue, which are characterized by the spontaneous breaking of chiral symmetry and quark confinement. As a consequence, massive, constituent quarks, as effective degrees of freedom to describe hadrons, are emergent together with the so-called Nambu-Goldstone bosons. Spectroscopy of baryons with heavy flavors provides good opportunities to investigate dynamics of such effective degrees of freedom, through which the behaviors of non-trivial QCD vacuum in low energy are to be revealed. We are particularly interested in diquark correlations in baryons. The diquark correlation is expected by an attractive spin-spin interaction between two quarks with spin-parity 0+ and the attractive interaction is a source of the diquark condensate in highly dense quark matter. The origin of the spin-spin interaction betwen quarks is a longstading question, where the effect of the non-trivial gluon field such as the so-called instanton-induced interaction (Kobayashi-Maskawa-t'Hooft interaction) is an issue. We expect to disentangle the diquark correlations by introducing heavy flavors in baryons.
I will discuss above-mentioned issues in baryon spectroscopy with heavy flavors to be conducted in the future facilities at J-PARC.
