Speaker
Dr
Yoshimasa Hidaka
(RIKEN Nishina Center)
Description
We discuss the phase diagram of quantum chromodynamics (QCD) at finite T and finite quark chemical potential \mu. In particular, we focus on the QCD critical point(s), which has attracted considerable attention in its search at the relativistic heavy ion collision experiments. However, not only the location, but even the existence has not yet been settled. In this talk, we show that the critical points are forbidden in flavor-symmetric QCD at finite \mu for any nonzero quark mass, as long as the coordinate (T, \mu) is outside the pion condensed phase in the corresponding phase diagram of QCD at finite isospin chemical potential \mu_I = 2\mu, if the two and higher quark loops are negligible in the thermodynamic potential and the correlation functions (The large-Nc QCD naturally satisfies this condition).
Reference
Y. Hidaka and N. Yamamoto, Phys. Rev. Lett.108, 121601 (2012).
Author
Dr
Yoshimasa Hidaka
(RIKEN Nishina Center)
Co-author
Dr
Naoki Yamamoto
(Yukawa Institute for Theoretical Physics, Kyoto University & Institute for Nuclear Theory, University of Washington)
