Speaker
KOJO TORU
(Tohoku Univeristy)
Description
Recent neutron star observations indicate that equations of state of QCD matter show soft-to-stiff evolution from nuclear to quark matter. This trend is difficult to explain in purely hadronic picture and a hybrid model of hadron-to-quark matter transition. It is important to treat hadrons as composite particles and include constraints coming from the quark substructure. I discuss how the quarks switch on the rapid evolution of stiffness. The onset density depends on quark wavefunctions in hadrons which may change in medium effects. How to handle the hyperon puzzle is also discussed.
