6 papers
Quantization of the charge in Coulomb plus harmonic potential
Yoon-Seok Choun, Sang-Jin Sin
We consider two models where the wave equation can be reduced to the effective Schrödinger equation whose potential contains both harmonic and the Coulomb terms, .…
Impossibility of convergence of a confluent Heun function on the boundary of the disc of convergence
Yoon-Seok Choun
The confluent Heun equation is one of 4 confluent forms of Heun's differential equation in which is the Fuchsian equation of second order with four regular singularities. A conflue…
Impossibility of convergence of a Heun function on the boundary of the disc of convergence
Yoon-Seok Choun
The Heun's equation is the Fuchsian equation of second order with four regular singularities. Heun functions generalize well-known special functions such as Spheroidal Wave, Lamé,…
Bridging the Chiral symmetry and Confinement with Singularity
Yoon-Seok Choun, Sang-Jin Sin
We consider a holographic quark model where the confinement is a consequence of the quark condensate. Surprisingly, the equation of motion of our holographic model can be mapped to…
Inexistence of quark mass in chiral symmetry and its relation to confinement dynamics
Yoon-Seok Choun
In 1985, Gürsey showed that the spectrum of the semi-relativistic Hamiltonian for the bag model, introduced by Lichtenberg et al. for mesons, follows the Regge trajectory if the cu…
Chiral symmetry and Heun's equation
Yoon-Seok Choun, Sang-Jin Sin
We show that the current quark mass should vanish to be consistent with the QCD color confinement: a bag model leads us to Heun's equation, which requests that not only the energy…