This book is a modern pedagogic introduction to the ideas and techniques of quantum field theory.
After a brief overview of particle physics and a survey of relativistic wave equations and Lagrangian methods，the quantum theory of scalar and spinor fields， and then of gauge fields，is developed The emphasis throughout is on functional methods，which have played a large part in modern field theory. The book concludes with a brief survey of `topological' objects in field theory and，new to this edition，a chapter devoted to supersymmetry.

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Prface to the first edition
Preface to the second edition
1 Intropduction:synosis of particle physics
1.1 Quantum field theory
1.2 Gravitation
1.3 Strong interactions
1.4 Weak interactions
1.5 Leptonic quantum numbers
1.6 Hadronic quantum numbers
1.7 Resonances
1.8 The quark model
1.9 SU（2）,SU（3）SU（4）
1.10 Dynamical evidence for quarks
1.11 Colour
1.12 QCD
1.13 Weak interactions
Guide to further reading

2 Single-particle relativistic wave equations
2.1 Rel;ativistic notation
2.2 Klein-Gordon equation
2.3 Dirac equation
SU（2）and the rotaion group
SL（2,C）and the antiparticles
2.4 Prdiciton of antiparticles
2.5 Construction of Dirac spinors:algebra of
2.6 Non-relativistic limit and the electron magnetic moment
2.7 The relevance of the Pointcare group operators and the zero mass limit
2.8 Maxwell and Proca equations
2.9 Maxwell's equations and differential geometry
Summary
Guide to further reading

3 Lagrangian formulation, symmetries and gauge fields
3.1 Lagrangian formulation ofparticle mechanics
3.2 The real scalar field: variational principle and Noether's theorem
3.3 Complex scalar fields and the electromagnetic field
3.4 Topology and the vacuum: the Bohm-Aharonov effect
3.5 The Yang-Mills field
3.6 The geometry of gauge fields
Summary
Guide to further reading

4 Canonical quantisation and particle interpretation
4.1 The real Klein-Gordon field
4.2 The complex Klein-Gordon field
4.3 The Dirac field
4.4 The electromagnetic field
Radiation gauge quantisation
Lorentz gauge quantisation
4.5 The massive vector field
Summary
Guide to further reading

5 Path integrals and quantum mechanics
5.1 Path-integralformulation ofquantum mechanics
5.2 Perturbation theory and the S matrix
5.3 Coulombscattering
5.4 Functional calculus: differentiation
5.5 Further properties of path integrals
Appendix: some useful integrals
Summary
Guide to further reading

6 Path-integral quantisation and Feynman rules:scalar and spinor fields
6.1 Generating functionalfor scalar fields
6.2 Functional integration
6.3 Free particle Green's functions
6.4 Generating functionals forinteracting fields
……
7 Path-imtegral quantisation:gauge fields
8 Spontaneous symmetry breaking and the Weinberg-Salam model
9 Renormalisation
10 Toplogical objects in field theory
References
Index