Abstract
We propose several quark mass deformations of the holographic model of massless QCD using the D4/D8/-brane configuration proposed by Sakai and Sugimoto. The deformations are based on introducing additional D4- or D6-branes away from the QCD D4 branes. The idea is similar to extended technicolor theories, where the chiral symmetry breaking by additional D-branes is mediated to QCD to induce non-zero quark masses. In the D-brane picture as well as the holographic dual gravity description, the quark and the pion masses are generated by novel worldsheet instantons with finite area. We also derive the Gell-Mann-Oakes-Renner relation, and find the value of the chiral condensate in the Sakai-Sugimoto model.
| Original language | English |
|---|---|
| Article number | 089 |
| Journal | Journal of High Energy Physics |
| Volume | 2008 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2008 Jul 1 |
Keywords
- AdS-CFT correspondence
- Gauge-gravity correspondence
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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