2015/12/31 by Zhiyuan Wang, Bo-Qiang Ma
Physics and Astronomy · #Black Holes and Theoretical Physics #Excited state #Hadron #High-Energy Particle Collisions Research #Meson #Nucleon #Observable #Phenomenology (philosophy) #Quantum Chromodynamics and Particle Interactions #Spectrum (functional analysis) #hep-ph
paper · pdf · doi:10.1140/epja/i2016-16122-2
19 latex pages, 5 figures, final version for publication
openalex publication_date 2016/05/01 · arxiv created 2016/05/09 · arxiv updated 2016/05/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose a unified approach to study meson, nucleon and Δ-baryon properties at zero and finite temperatures in the context of hard-wall AdS/QCD model. We first combine some previous works dealing with mesons and baryons separately, and introduce a new parameter~ξ so that the model could give a universal description of spectrum and couplings of both sectors in a self-consistent way. All observables calculated numerically show reasonable agreement with experimental data. We then study these observables at nonzero temperature by modifying the AdS space-time into AdS-Schwartzchild space-time. Numerically solving the model, we find an interesting temperature dependence of the spectrum and the couplings. We also make a prediction on the finite temperature decay width of some nucleon and Δ excited states.