Quark Mass Dependence of Hadron Spectrum in Holographic QCD

Details Quark Mass Dependence of Hadron Spectrum in Holographic QCD Quark Mass Dependence of Hadron Spectrum in Holographic QCD

2009-06-02

arxiv.org/abs/0906.0402v2

Phys.Rev.D81:045016,2010

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, v2: matching with lattice data updated for Delta, references added

Scientific paper

10.1103/PhysRevD.81.045016

We compute a shift of baryon mass spectra due to quark masses in perturbation, in Sakai-Sugimoto model of holographic QCD. We find the shift for the ground state nucleons to be \delta M = 4.1 m_{\pi}^2 [GeV^{-1}], which is consistent with the current lattice QCD result. We predict the same value of the shift for N(1535) and Delta, while a larger value 7.7 m_{\pi}^2 [GeV^{-1}] for Roper N(1440). We also present some evidences that the shifts of the vector meson masses are suppressed in the large 't Hooft coupling limit.

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