Gauge-invariant proper self-energies and vertices in gauge-theories with broken symmetry
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Gauge-invariant proper self-energies and vertices in gauge-theories with broken symmetry

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Gauge-invariant proper self-energies and vertices in gauge-theories with broken symmetry

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dc.contributor.author Papavassiliou, Joannis
dc.date.accessioned 2015-04-10T07:54:10Z
dc.date.available 2015-04-10T07:54:10Z
dc.date.issued 1990
dc.identifier.uri http://hdl.handle.net/10550/42978
dc.description.abstract Using the pinch technique, we show how to recover, from the S matrix of a spontaneously broken non-Abelian gauge theory, proper self-energies and vertices which are fully gauge invariant when one or more momenta are off shell. Explicit calculations are carried out at the one-loop level for gauge-boson self-energies and fermion-gauge-boson vertices in a simple SU(2) gauge theory with a Higgs boson. The same technique allows us to calculate, at one-loop order, a neutrino electromagnetic form factor which is gauge invariant at all photon momenta, thus resolving a long-standing problem. We show how massless Goldstone bosons, not present in the S matrix, must be introduced into Green's functions in order to reconcile gauge invariance and renormalizability.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 1990, vol. 41, num. 10, p. 3179-3191
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Papavassiliou, Joannis 1990 Gauge-invariant proper self-energies and vertices in gauge-theories with broken symmetry Physical Review D 41 10 3179 3191
dc.subject Física
dc.title Gauge-invariant proper self-energies and vertices in gauge-theories with broken symmetry
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-04-10T07:54:10Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.41.3179
dc.identifier.idgrec 091116

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