Asymmetric dense matter in holographic QCD

¹ Asia Pacific Center for Theoretical Physics, Pohang, Gyeongbuk 790-784, Republic of Korea
² Department of Physics, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea
³ Center for Quantum Spacetime, Sogang University, Seoul 121-742, Korea
⁴ Department of Physics, Hanyang University, Seoul 133-791, Korea

^a e-mail: ykim@apctp.org
^b e-mail: yseo@sogang.ac.kr
^c e-mail: geniean@apctp.org
^d e-mail: sjsin@hanyang.ac.kr

Abstract

We study asymmetric dense matter in holographic QCD.We construct asymmetric dense matter by considering two quark flavor branes with dierent quark masses in a D4/D6/D6 model. To calculate the symmetry energy in nuclear matter, we consider two quarks with equal masses and observe that the symmetry energy increases with the total charge showing the stiff dependence. This behavior is universal in the sense that the result is independent of parameters in the model. We also study strange (or hyperon) matter with one light and one intermediate mass quarks. In addition to the vacuum properties of asymmetric matter, we calculate meson masses in asymmetric dense matter and discuss our results in the light of in-medium kaon masses.