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	Relativistic Quantum Mechanics by R. Parthasarathy
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Relativistic Quantum Mechanics begins with the Klein-Gordon equation describing its features and motivating the need for a correct relativistic equation for the electron. It then introduces the Dirac equation by linearizing the second order relativistic equation which reveals the spin, spin magnetic moment and the spin-orbit coupling of the electron. After demonstrating the relativistic covariance of the Dirac equation, the discrete transformations of the Dirac spinor, are explained. The Dirac equation for a free electron and an electron in hydrogen atom are solved “ these solutions are used to interpret the negative energy states in the ˜hole theory` of Dirac. As applications of the Dirac equation, the scattering of electrons by a Coulomb potential is given in detail and extended to electron-proton scattering. As a further application, the Dirac equation with zero mass is considered to describe the neutrino. The chapter on neutrinos contains a brief description of ˜neutrino oscillations`. The book ends with giving an elementary treatment of spin manifolds with illustrative examples.
ISBN-9788184870046

Pages : 220

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Relativistic Quantum Mechanics

by R. Parthasarathy