factors 188Р Summary of chapter 193Р Further reading 193Р Exercises 193Р8 The low-energy limit of the electroweak theory 195Р 8.1 A four-fermion model 195Р 8.2 Charged and neutral currents in the Standard Model 197Р 8.3 Solved problems: weak decays 202Р −−Р µ e ¯e µ 202Р + +Р l l 205Р Isospin and flavor SU(3) 209Р 0 −+Р K l l 212Р Summary of chapter 216Р Further reading 217Р Exercises 217Р9 Path integral quantization 219Р 9.1 Path integral formulation of quantum mechanics 220Р 9.2 Path integral quantization of scalar fields 224Р 9.3 Perturbative evaluation of the path integral 225Р 9.4 Euclidean formulation 228Р 9.5 QFT and critical phenomena 231Р 9.6 QFT at finite temperature 238Р 9.7 Solved problems 239Р Instantons and tunneling 239Р Summary of chapter 241Р Further reading 242
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