Unitary clothing transformations yield momentum-independent second-order fermion mass shifts due to vector boson exchange without mass counterterms in the S-matrix for nucleon-rho and electron-photon models.
But in the theory developed here quantities like m(2) 11 (p) orδm(2) are not considered as some corrections to the badly de- fined bare mass m0
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Clothed particle representation in quantum field theory: Fermion mass renormalization due to vector boson exchange
Unitary clothing transformations yield momentum-independent second-order fermion mass shifts due to vector boson exchange without mass counterterms in the S-matrix for nucleon-rho and electron-photon models.