Quark Mass in the Sakai-Sugimoto Model of Chiral Symmetry Breaking
arXiv:0706.3285
Abstract
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.
arXiv comment14 pages, 4 figures, added discussion
References in corpus (11)
- Chiral Symmetry Breaking and Pions in Non-Supersymmetric Gauge/Gravity Duals
- Anti De Sitter Space And Holography
- Chiral symmetry breaking as open string tachyon condensation
- Chiral Dynamics From AdS Space
- NJL and QCD from String Theory
- Chiral symmetry breaking driven by dilaton
- Holographic Electroweak Symmetry Breaking from D-branes
- Chiral Symmetry Breaking from Intersecting D-Branes
- D7 Brane Embeddings and Chiral Symmetry Breaking
- Holographic QCD and Pion Mass
- A note on fermions in holographic QCD