Abstract
We follow the historical approach of Dirac who, in 1928, searched for a relativistic covariant wave equation of the Schrödinger form
with positive definite probability density. At that time there were doubts concerning the Klein-Gordon equation, which did not yield such probability density [see (1.29)]. The charge density interpretation was not known at that time and would have made little physical sense, because π+and π-mesons as charged spin-0 particles had not yet been discovered.
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© 1990 Springer-Verlag Berlin Heidelberg
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Greiner, W. (1990). A Wave Equation for Spin-½ Particles — The Dirac Equation. In: Relativistic Quantum Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-88082-7_2
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DOI: https://doi.org/10.1007/978-3-642-88082-7_2
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-99535-7
Online ISBN: 978-3-642-88082-7
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