An Introduction to Quantum Field Theory
Avalon Publishing, 2 ott 1995 - 842 pagine
An Introduction to Quantum Field Theory is a textbook intended for the graduate physics course covering relativistic quantum mechanics, quantum electrodynamics, and Feynman diagrams. The authors make these subjects accessible through carefully worked examples illustrating the technical aspects of the subject, and intuitive explanations of what is going on behind the mathematics. After presenting the basics of quantum electrodynamics, the authors discuss the theory of renormalization and its relation to statistical mechanics, and introduce the renormalization group. This discussion sets the stage for a discussion of the physical principles that underlie the fundamental interactions of elementary particle physics and their description by gauge field theories.
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amplitude calculation Callan-Symanzik equation cancel Chapter coefﬁcient compute contribution corrections correlation functions counterterm coupling constant cross section deep inelastic deﬁne deﬁnition derivative dimensions Dirac discussion e+e_ electron energy evaluate example expression factor fermion Feynman diagrams Feynman rules ﬁnal ﬁnd ﬁnite ﬁrst ﬁxed point ﬂavor ﬂow formula functional integral gauge boson gauge ﬁeld gauge invariance gauge theory gives gluon Goldstone boson Green’s function hadrons Hamiltonian Higgs Klein-Gordon Lagrangian left-handed leptons logarithms loop Lorentz mass term massless matrix element momenta momentum non-Abelian gauge theories nonzero one-loop operator parameters particles perturbation theory photon physical predictions propagator quantum ﬁeld theory quark relation renormalizable renormalization group representation rescaling result right-handed S-matrix satisﬁes scalar ﬁeld scale scattering shown in Fig speciﬁc spin spinor spontaneously broken symmetry theorem tion transformation ultraviolet divergences vacuum expectation value vector vertex W boson Ward identity weak interaction zero