Baryon-number-induced Chern-Simons couplings of vector and axial-vector mesons in holographic QCD

被引:110
作者
Domokos, Sophia K.
Harvey, Jeffrey A.
机构
[1] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[2] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
关键词
D O I
10.1103/PhysRevLett.99.141602
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that holographic models of QCD predict the presence of a Chern-Simons coupling between vector and axial-vector mesons at finite baryon density. In the Anti de Sitter/Conformal Field Theory dictionary, the coefficient of this coupling is proportional to the baryon number density and is fixed uniquely in the five-dimensional holographic dual by anomalies in the flavor currents. For the lightest mesons, the coupling mixes transverse rho and a(1) polarization states. At sufficiently large baryon number densities, it produces an instability, which causes the rho and a(1) mesons to condense in a state breaking both rotational and translational invariance.
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