We investigate the Sakai-Sugimoto model at nonzero baryon chemical potential in a background magnetic field in the confined phase where chiral symmetry is broken. The D8-brane Chern-Simons term holographically encodes the axial anomaly and generates a gradient of the η' meson, which carries a non-vanishing baryon charge. Above a critical value of the chemical potential, there is a second-order phase transition to a mixed phase which includes also ordinary baryonic matter. However, at fixed baryon charge density, the matter is purely η'-gradient above a critical magnetic field.
|Journal||Journal of Physics: Conference Series|
|State||Published - 2013|
|Event||6th International Symposium on Quantum Theory and Symmetries, QTS 2009 - Lexington, KY, United States|
Duration: 20 Jul 2009 → 25 Jul 2009
ASJC Scopus subject areas
- Physics and Astronomy (all)