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Phys. Rev. D 76, 086003 (2007) [5 pages]

Deconfinement phase transition in holographic QCD with matter

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Youngman Kim*
School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Korea

Bum-Hoon Lee
Department of Physics, Sogang University, Seoul, Korea 121-742 and CQUeST, Sogang University, Seoul, Korea 121-742

Siyoung Nam and Chanyong Park§
CQUeST, Sogang University, Seoul, Korea 121-742

Sang-Jin Sin**
Department of Physics, BK21 Program Division, Hanyang University, Seoul 133-791, Korea

Received 4 July 2007; published 22 October 2007

In the framework of a holographic QCD approach we study the influence of matter on the deconfinement temperature Tc. We first consider the quark flavor number (Nf) dependence of Tc. We observe that Tc decreases with Nf, which is consistent with a lattice QCD result. We also delve into how the quark number density ρq affects the value of Tc. We find that Tc drops with increasing ρq. In both cases, we confirm that the contributions from quarks are suppressed by 1/Nc, as it should be, compared to the ones from a gravitational action (pure Yang-Mills theory).

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.76.086003
DOI:
10.1103/PhysRevD.76.086003
PACS:
12.38.Mh, 11.25.Tq, 25.75.Nq

*chunboo81@kias.re.kr

bhl@sogang.ac.kr

stringphy@gmail.com

§cyong21@sogang.ac.kr

**sjsin@hanyang.ac.kr