Meson Spectra and Thermodynamics in Soft-Wall AdS/QCD

Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus–Nucleus Collisions 2012

Bartz, Sean P.^1 ; Kapusta, Joseph I.^1

Tate Laboratory of Physics, 116 Church St SE, Minneapolis, MN 55455, United States^1

关键词: Background field;    Chiral symmetry;    Dilaton fields;    Linear trajectory;    Meson spectra;    Parametrizations;    Quantum chromodynamics;    Scalar potential;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/446/1/012019/pdf
DOI  :  10.1088/1742-6596/446/1/012019

来源: IOP

【 摘 要 】

The AdS/CFT correspondence may offer new and useful insights into the non-perturbative regime of strongly coupled gauge theories such as Quantum Chromodynamics. Soft-wall AdS/QCD models have reproduced the linear trajectories of meson spectra by including background dilaton and chiral condensate fields. Efforts to derive these background fields from a scalar potential have so far been unsuccessful in satisfying the UV boundary conditions set by the AdS/CFT dictionary while reproducing the IR behavior needed to obtain the correct chiral symmetry breaking and meson spectra. We present a three-field scalar parametrization that includes the dilaton field and the chiral and glueball condensates. This model is consistent with linear trajectories for the meson spectra and the correct mass-splitting between the vector and axial-vector mesons. We also present the resulting meson trajectories.