Nonlinear corrections in basic problems of electro-and magneto-statics in the vacuum

Autor(es)

Costa, Caio V. ^[1] ; Gitman, Dmitry M. ^[1] ; Shabad, Anatoly E. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil

^[2] PN Lebedev Phys Inst, Moscow 117924 - Russia

• Tipo de documento: Artigo Científico
• Fonte: Physical Review D; v. 88, n. 8 OCT 21 2013.
• Citações Web of Science: 11

Resumo

We point that any theoretically found value for an electromagnetic multipole of a baryon or a meson should be subjected to ``renormalization'' due to nonlinearity of QED. We find third-power nonlinear corrections to the Coulomb and other static electric fields, as well as to the electric and magnetic dipole fields, as we work within QED with no background field. The nonlinear response function on which we base our consideration is the fourth-rank polarization tensor, calculated within the local (infrared) approximation of the effective action, the results being applicable to weakly varying and not too strong fields. It is established that the nonlinear corrections to magnetic moments of some baryons and mesons, fitting the present approximate scheme, match the existing indeterminacy in their theoretical values. (AU)

• Processo FAPESP: 11/51867-9 - Anatoly Efimovich Shabad | PN Lebedev Physical Institute - Rússia
• Beneficiário: Dmitri Maximovitch Guitman
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional