Speaker
Description
In this talk, I present our recent investigation of charmonium systems in strong external magnetic fields using a relativistic light-front Hamiltonian approach within the basis light-front quantization (BLFQ) framework. By solving the eigenvalue problem for the invariant mass squared operator — incorporating confinement potentials and one-gluon-exchange interactions — we compute the mass spectrum and wave functions across varying magnetic field strengths. Our results reveal significant spectral modifications driven by the Zeeman effect, including $\eta_c$-$J/\psi$ mixing and splitting of magnetic sublevels. Analysis of the momentum density distributions shows pronounced wave function deformation: transverse momentum broadening and longitudinal compression in strong fields, along with notable structural changes in parton distribution profiles — such as the emergence of double-hump structures in excited states. We find that relativistic corrections and center-of-mass coupling play a crucial role in these dynamics, underscoring the necessity of a fully relativistic treatment for accurately describing QCD bound states in extreme electromagnetic environments and vorticity.
