Dynamical chiral symmetry breaking and instability in nonplanar quenched quantum electrodynamics: A computational study
Abstract
The purpose of this study is to see how the fermion mass arises in QED vacuum. In planar quenched approximation, it is known that the continuum limit of the theory does not exist. As a nonplanar approximation, we use the vertex ansatz due to Curtis and Pennington in the quenched model. We find that (1) beyond a high-enough coupling, the Dyson-Schwinger equation of a fermion propagator does not have a stable solution and that (2) the Bethe-Salpeter wavefunction of a spinless massless fermion-antifermion bound state is always zero.
Degree
Ph.D.
Advisors
Kuo, Purdue University.
Subject Area
Particle physics
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