QCD and a Holographic Model of Hadrons

QCD and a Holographic Model of Hadrons

Dated: January 2005 | Joshua Erlich,1 Emanuel Katz,2 Dam T. Son,3 and Mikhail A. Stephanov1
The authors propose a five-dimensional holographic model to study low-energy properties of Quantum Chromodynamics (QCD). The model is inspired by the AdS/CFT correspondence and aims to holographically reproduce the dynamics of chiral symmetry breaking in QCD. The field content of the 5D theory includes fields corresponding to the left- and right-handed currents and the chiral order parameter. The model has four free parameters, one of which is fixed by the number of colors, while the other three are fitted to experimental data for the $\rho$ meson mass, pion mass, and pion decay constant. The model successfully predicts other low-energy hadronic observables with an rms error of 15% for Model A and 9% for a global fit to all seven observables. The authors discuss potential extensions of the model, including the inclusion of glueballs, power corrections, and the strange quark sector, as well as the incorporation of the chiral anomaly and running of the gauge coupling.The authors propose a five-dimensional holographic model to study low-energy properties of Quantum Chromodynamics (QCD). The model is inspired by the AdS/CFT correspondence and aims to holographically reproduce the dynamics of chiral symmetry breaking in QCD. The field content of the 5D theory includes fields corresponding to the left- and right-handed currents and the chiral order parameter. The model has four free parameters, one of which is fixed by the number of colors, while the other three are fitted to experimental data for the $\rho$ meson mass, pion mass, and pion decay constant. The model successfully predicts other low-energy hadronic observables with an rms error of 15% for Model A and 9% for a global fit to all seven observables. The authors discuss potential extensions of the model, including the inclusion of glueballs, power corrections, and the strange quark sector, as well as the incorporation of the chiral anomaly and running of the gauge coupling.
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