Quark mass in the Sakai-Sugimoto model of chiral symmetry breaking

Evans, Nick and Threlfall, Ed (2007) Quark mass in the Sakai-Sugimoto model of chiral symmetry breaking. Pre-print, 1-14.


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Original Publication URL: http://arxiv.org/abs/0706.3285


We re-analyze D8 brane embeddings in the geometry of a D4 brane wrapped on a circle that describe chiral symmetry breaking in a strongly coupled non-supersymmetric gauge theory. We argue that if the holographic fields are correctly interpreted, the original embeddings describe a complex quark mass and condensate in the theory. We show that in this interpretation when a quark mass is present there is a massive pseudo Goldstone boson (pion). A previously identified massless fluctuation is, we argue, not a physical state in the field theory. We also determine the behaviour of the quark condensate as a function of the quark mass.

Item Type: Article
Additional Information: arXiv:0706.3285v2
Related URLs:
Subjects: Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 57207
Date Deposited: 13 Aug 2008
Last Modified: 08 Oct 2015 08:54
URI: http://eprints.soton.ac.uk/id/eprint/57207

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