Asymptotic Freedom in Holographic QCD
arXiv:1110.2037 · doi:10.1007/JHEP12(2011)026
Abstract
We calculate the running of the quark mass and the quark condensate using a dynamical soft-wall model by Csaki and Reece. We show that a correct running can be obtained with an appropriate sign for the dilaton field. In the soft-wall model with quadratic dilaton profile, a wrong sign for the dilaton field can give rise to a massless vector meson, a signature of spontaneously broken symmetry in the vector sector, which is not observed in nature. With a right parameter range, we obtain no such massless vector meson. We also find that, contrary to the soft-wall model with quadratic dilaton profile, the model allows a non-vanishing quark condensate in the chiral limit. We obtain the vector meson mass spectrum similar to that of the hard-wall model. By varying a parameter in the model we can fit the running of the quark mass and of the quark condensate.
15 pages, 4 figures
References in corpus (22)
- Linear Confinement and AdS/QCD
- Hadronic Spectra and Light-Front Wavefunctions in Holographic QCD
- Light-Front Dynamics and AdS/QCD Correspondence: The Pion Form Factor in the Space- and Time-Like Regions
- A Holographic Prediction of the Deconfinement Temperature
- Toward a Systematic Holographic QCD: A Braneless Approach
- Form Factors and Wave Functions of Vector Mesons in Holographic QCD
- Baryon Number-Induced Chern-Simons Couplings of Vector and Axial-Vector Mesons in Holographic QCD
- Gravitational Form Factors of Vector Mesons in an AdS/QCD Model
- Generalized parton distributions in AdS/QCD
- Pion Form Factor in Chiral Limit of Hard-Wall AdS/QCD Model
- Dynamical Soft-Wall AdS/QCD
- On a Holographic Model for Confinement/Deconfinement
- Pion Form Factors in Holographic QCD
- On the sign of the dilaton in the soft wall models
- Pion Form Factor in Improved Holographic QCD Backgrounds
- Gravitational Form Factors in the Axial Sector from an AdS/QCD Model
- Anomalous Form Factor of the Neutral Pion in Extended AdS/QCD Model with Chern-Simons Term
- Pion form factors
- Pion condensation in holographic QCD
- Phenomenology Of The Holographic Soft-Wall Model Of QCD With "Reversed" Dilaton
- Extracting the condensate for light quarks beyond the chiral limit in models of QCD
- Recent Results in AdS/QCD