منابع مشابه
Philosophical Aspects of Quantum Field Theory: II
According to a regnant criterion of physical equivalence for quantum theories, a quantum field theory (QFT) typically admits continuously many physically inequivalent realizations. This, the second of a two-part introduction to topics in the philosophy of QFT, continues the investigation of this alarming circumstance. It begins with a brief catalog of quantum field theoretic examples of this no...
متن کاملPhysics 523 , Quantum Field Theory II Homework
Superficially, this theory will diverge very similarly to quantum electrodynamics because the fields and the coupling constant have the same dimensions as in quantum electrodynamics. Therefore, we see that the superficial divergence is given by D = 4L − 2Pφ − Pe where L represents the number of loops and Pφ and Pe represent the number of pseudo-scalar and fermion propagator particles, respectiv...
متن کامل8.324 Relativistic Quantum Field Theory II
The renormalization program has been shown to be a success operationally: 1. For a renormalizable theory, all ultraviolet divergences can be absorbed into redefinitions of bare quan tities, which are not observable. What is meant by the set of physical observables is unambiguous: it is well-defined in terms of a small number of physical couplings, masses and so forth. 2. The requirement of ren...
متن کاملPhysics 523 , Quantum Field Theory II
a) Let us determine the superficial divergence D for this theory in terms of the number of vertices V and the number of external lines N . From this we are to show that the theory is superrenormalizable. In generality, the superficial divergence of a φ theory in d dimensions can be given by D = dL − 2P , where L is the number of loops and P is the number of propagators because each loop contrib...
متن کاملResummation of mass terms in perturbative massless quantum field theory
The neutral massless scalar quantum field Φ in four-dimensional spacetime is considered, which is subject to a simple bilinear self-interaction. Is is well-known from renormalization theory that adding a term of the form −m2 2 Φ to the Lagrangean has the formal effect of shifting the particle mass from the original zero value to m after resummation of all two-leg insertions in the Feynman graph...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1971
ISSN: 0033-068X
DOI: 10.1143/ptp.46.1278