Speaker
Kanako Yamazaki
(University of Tokyo)
Description
We study the QCD phase transition, especially the change of degrees of freedom from hadrons to quarks. In order to describe the chiral phase transition and the deconfinement transition at the same time, we choose the Nambu-Jana-Lasinio model with Polyakov loop (PNJL model). This model was proposed by combining the Nambu-Jana-Lasinio model which describes the chiral transition and the Polyakov loop which works as an order parameter of deconfinement transition. We calculated an equation of state by an approach beyond the mean field approximation to take thermal excitations of hadrons into account. In this method, mesons can be introduced as auxiliary fields, and their excitations are described as thermal fluctuations of auxiliary fields. We will present an equation of state concerning mesonic excitations at zero quark chemical potential in the two- and three-flavor PNJL model for interacting quarks [1, 2]. In addition, we have thought the way to introduce baryonic correlation as the three body system of quarks at finite chemical potential. In this case, it is necessary to consider how to put interactions between three quarks, unlike mesons as the two body system of quark and anti-quark. We will also discuss about that.
[1] K. Yamazaki and T. Matsui, Nucl. Phys. A 913 (2013) 19.
[2] K. Yamazaki and T. Matsui, Nucl. Phys. A 922 (2014) 237.
| On behalf of collaboration: | None |
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Primary author
Kanako Yamazaki
(University of Tokyo)
Co-author
Prof.
Tetsuo Matsui
(University of Tokyo)
