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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, pp. 1-14.

Record type: Article


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.

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Published date: 22 June 2007
Additional Information: arXiv:0706.3285v2


Local EPrints ID: 57207
PURE UUID: 231e5d64-e92d-49bc-8f52-fe24290e7c93

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Date deposited: 13 Aug 2008
Last modified: 17 Jul 2017 14:29

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Author: Nick Evans
Author: Ed Threlfall

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