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"Bulk fields with brane kinetic terms"

Relatore: Manuel Perez-Victoria- Universita' di Padova

Aula Einstein
21 Gennaio 2003 ore 15.30

Models with extra dimensions typically include one or more "branes" which break translation invariance in the orthogonal coordinates. It is then possible to have in the action operators localized on the branes, not only for brane fields but also for fields living in the bulk. These include brane kinetic terms which modify the propagation of bulk fields. In this talk I will show how these terms are induced by quantum corrections and study the effect of general brane kinetic terms on bulk scalars, fermions and gauge bosons. I will pay special attention to brane terms containing derivatives in the orthogonal directions, which give rise to a rather singular behaviour of the fields.