Workshop on Heavy-Quark Exotics

Contribution List

3. Mass spectrum of hadrons in dense two-color QCD

In the vacuum of ordinary QCD, the lightest hadron is the pion, which is an isotriplet pseudoscalar meson. This can be shown using QCD inequalities, if we assume that the theory possesses gamma_5 Hermiticity and that disconnected diagrams do not contribute. However, in the finite-density regime, gamma_5 Hermiticity is lost, and this argument no longer holds. In contrast, in two-color QCD, an...

2. Reconsideration of two-pion exchange potential

The HAL computations suggest the ``two-pion exchange potential'' at (semi-)long range regime. In this talk I introduce its theoretical development and explain my ideas.