Fundamental Problems in Quantum Field Theory


Takehisa Fujita, Naohiro Kanda

DOI: 10.2174/97816080575591130101
eISBN: 978-1-60805-754-2, 2013
ISBN: 978-1-60805-755-9

Indexed in: EBSCO.

Quantum physics is based on four fundamental interactions of electromagnetic, weak, gravitational and strong forces. All t...[view complete introduction]
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S-Matrix Theory

- Pp. 20-34 (15)

Takehisa Fujita and Naohiro Kanda


In this chapter, we discuss the S-matrix theory in quantum field theory. Here, we first treat the non-relativistic scattering theory and its relation to the Tmatrix. In particular, we discuss the scattering problem in terms of the Lippmann- Schwinger equation. Then we discuss the S-matrix theory in quantum field theory. This is based on the perturbation theory and we present the example of the S-matrix evaluation. In particular, we discuss some basic problems in the Feynman propagator of photon and show a possible physical difference between Feynman and correct propagators of photon.

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