Heavy quarkonium in a holographic QCD model
Abstract
Encouraged by recent developments in AdS/QCD models for the light quark system, we study heavy quarkonium in the framework of the AdS/QCD models. We calculate the masses of cc vector meson states using the AdS/QCD models at zero and at finite temperature. Among the models adopted in this work, we find that the softwall model describes the lowlying heavy quark meson states at zero temperature relatively well. At finite temperature, we observe that once the bound state is above T{sub c}, its mass will increase with temperature until it dissociates at a temperature of around 494 MeV. It is shown that the dissociation temperature is fixed by the infrared cutoff of the models. The present model serves as a unified nonperturbative model to investigate the properties of bound quarkonium states above T{sub c}.
 Authors:
 School of Physics, Korea Institute for Advanced Study, Seoul 130722 (Korea, Republic of)
 Institute of Physics and Applied Physics, Yonsei University, Seoul 120749 (Korea, Republic of)
 Publication Date:
 OSTI Identifier:
 20929547
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.75.114008; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B QUARKS; BOUND STATE; C QUARKS; D QUARKS; HOLOGRAPHY; MASS; MEV RANGE 1001000; PARTICLE MODELS; QUANTUM CHROMODYNAMICS; QUARKONIUM; T QUARKS; U QUARKS; VECTOR MESONS
Citation Formats
Kim, Youngman, Lee, JongPhil, and Lee, Su Houng. Heavy quarkonium in a holographic QCD model. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVD.75.114008.
Kim, Youngman, Lee, JongPhil, & Lee, Su Houng. Heavy quarkonium in a holographic QCD model. United States. doi:10.1103/PHYSREVD.75.114008.
Kim, Youngman, Lee, JongPhil, and Lee, Su Houng. Fri .
"Heavy quarkonium in a holographic QCD model". United States.
doi:10.1103/PHYSREVD.75.114008.
@article{osti_20929547,
title = {Heavy quarkonium in a holographic QCD model},
author = {Kim, Youngman and Lee, JongPhil and Lee, Su Houng},
abstractNote = {Encouraged by recent developments in AdS/QCD models for the light quark system, we study heavy quarkonium in the framework of the AdS/QCD models. We calculate the masses of cc vector meson states using the AdS/QCD models at zero and at finite temperature. Among the models adopted in this work, we find that the softwall model describes the lowlying heavy quark meson states at zero temperature relatively well. At finite temperature, we observe that once the bound state is above T{sub c}, its mass will increase with temperature until it dissociates at a temperature of around 494 MeV. It is shown that the dissociation temperature is fixed by the infrared cutoff of the models. The present model serves as a unified nonperturbative model to investigate the properties of bound quarkonium states above T{sub c}.},
doi = {10.1103/PHYSREVD.75.114008},
journal = {Physical Review. D, Particles Fields},
number = 11,
volume = 75,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2007},
month = {Fri Jun 01 00:00:00 EDT 2007}
}

Here, we study the heavy quarkonium within the basis lightfront quantization approach. We implement the onegluon exchange interaction and a confining potential inspired by lightfront holography. We adopt the holographic lightfront wavefunction (LFWF) as our basis function and solve the nonperturbative dynamics by diagonalizing the Hamiltonian matrix. We obtain the mass spectrum for charmonium and bottomonium. With the obtained LFWFs, we also compute the decay constants and the charge form factors for selected eigenstates. The results are compared with the experimental measurements and with other established methods.Cited by 17

Heavy quarkonium in a holographic basis
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