Universal holographic chiral dynamics in an external magnetic field

Filev, Veselin G. and Johnson, Clifford V. and Shock, Jonathan P. (2009) Universal holographic chiral dynamics in an external magnetic field. Journal of High Energy Physics, 2009 (08). 013-013. ISSN 1029-8479

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Official URL: http://doi.org/10.1088/1126-6708/2009/08/013

Abstract

In this work we further extend the investigation of holographic gauge theories in external magnetic fields, continuing earlier work. We study the phenomenon of magnetic catalysis of mass generation in 1+3 and 1+2 dimensions, using D3/D7– and D3/D5–brane systems, respectively. We obtain the low energy effective actions of the corresponding pseudo Goldstone bosons and study their dispersion relations. The D3/D7 system exhibits the usual Gell-Mann–Oakes–Renner (GMOR) relation and a relativistic dispersion relation, while the D3/D5 system exhibits a quadratic non-relativistic dispersion relation and a modified linear GMOR relation. The low energy effective action of the D3/D5 system is related to that describing magnon excitations in a ferromagnet. We also study properties of general Dp/Dq systems in an external magnetic field and verify the universality of the magnetic catalysis of dynamical symmetry breaking.

Item Type: Article
Divisions: School of Theoretical Physics > Preprints
Date Deposited: 05 Oct 2017 19:19
Last Modified: 13 Jul 2018 11:17
URI: http://dair.dias.ie/id/eprint/241

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