Universal holographic chiral dynamics in an external magnetic field

被引：45

作者：

Filev, Veselin G. ^{[1
]}

Johnson, Clifford V. ^{[2
]}

Shock, Jonathan P. ^{[3
,4
]}

机构：

[1] Dublin Inst Adv Studies, Sch Theoret Phys, Dublin 4, Ireland

[2] Univ So Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA

[3] Univ Santiago de Compostela, Dept Fis Particulas, E-15782 Santiago De Compostela, Spain

[4] IGFAE, E-15782 Santiago De Compostela, Spain

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2009年 / 08期

关键词：

AdS-CFT Correspondence; D-branes; GROSS-NEVEU MODEL; 3-DIMENSIONAL GROSS; NONZERO TEMPERATURE; SYMMETRY-BREAKING;

D O I：

10.1088/1126-6708/2009/08/013

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

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.

引用

页数：37

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