Open AccessPHOTON-PHOTON SCATTERING IN SPONTANEOUSLY BROKEN GAUGE THEORIES
Author(s) -
Zhao Bao-Heng
Publication year - 1976
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.25.53
Subject(s) - physics , scattering amplitude , scattering , photon , quantum electrodynamics , gauge theory , amplitude , symmetry breaking , gauge (firearms) , gauge symmetry , crossing , scattering length , field (mathematics) , particle physics , meson , quantum mechanics , mathematics , archaeology , pure mathematics , history
We investigate the contributions of W-meson intermediate states to photon-photon scattering in SU(2)L×U(1) model. Because the spontaneously broken gauge theories are renormalizable and the electromagnetic gauge invariance remains valid under symmetry-breaking, the infinities in the scattering amplitude of one loop approximation must cancel each other. We show the finiteness of the photon-photon scattering amplitude by calculation. We give the effective nonlinear interaction Lagrangian of the electromagnetic field and the scattering cross section at low energies. At low energies the leptonic intermediate states dominate the scattering amplitude, but at high energy limits the contributions of W-meson intermediate states are comparable with the contributions of leptonic intermediate states.