Relativistic path integral and relativistic Hamiltonians in QCD and QED

preprint2013arXivOpen access

Abstract

The proper-time 4d path integral is used as a starting point to derive the new explicit parametric form of the quark-antiquark Green's function in gluonic and QED fields, entering as a common Wilson loop. The subsequent vacuum averaging of the latter allows to derive the instantaneous Hamiltonian. The explicit form and solutions are given in the case of the qqˉq\bar q mesons in magnetic field.

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