SPACE-TIME SYMMETRIES AND SUPERSYMMETRY OF COINCIDENT D-BRANES

por D. Sorokin (University of Padova)

jueves 31 oct. 2002 12:30 → 13:30 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

Recently there has been an interest in various brane world scenarios which intend to get the Standard Model (or its minimal supersymmetric extension) as a theory of coincident and intersecting Dirichlet branes. These suppose to explain the origin of the SU(3)xSU(2)xU(1) gauge symmetry and its spontaneous breaking, the existence of three families of chiral fermions, solve the hierarchy problem etc. To put these models on a solid dynamical ground one should know the structure of effective actions which describe the dynamic of multiple brane configurations. We shall discuss problems which one encounters in the way of constructing such actions and to make them supersymmetric. This topic is intrinsically related to the problem of the construction of a supersymmetric non-Abelian Dirac-Born-Infeld theory which would reproduce the superstring theory effective action.