Premium
Field Operator for Unstable Particle and Complex Mass Description in Local QFT
Author(s) -
Lukierski J.
Publication year - 1980
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.19800280503
Subject(s) - covariant transformation , renormalization , operator (biology) , physics , mathematical physics , field theory (psychology) , field (mathematics) , spectrum (functional analysis) , order (exchange) , quantum field theory , classical mechanics , mathematics , quantum mechanics , pure mathematics , biochemistry , chemistry , finance , repressor , transcription factor , economics , gene
We consider the equations describing the local covariant unstable particle field operator as the functional of stable asymptotic decay products. In such a framework, we present two generalizations of the Yang‐Feldman equation, which can be used for the description of unstable particles. In order to introduce a complex mass parameter, we discuss the generalizations of mass renormalization procedure. Also we consider briefly the description using fields with continuous spectrum of asymptotic masses.