Monopoles, Dyons and Theta term in Born-Infeld Theory

N E GRANDI; R L PAKMAN; F A SCHAPOSNIK; G A SILVA

Sao Lorenzo

Congreso; XX Encontro Nacional de Física de Partículas e Campos; 1999

Sociedad Brasilera de Fisica

We present dyon solutions to an SU(2) Dirac-Born-Infeld (DBI) gauge theory coupled to a Higgs triplet. We discuss the existence of a critical value of $eta$, the Born-Infeld absolute field parameter, below which the solution ceases to exist. We also analyse the effect of modifying the DBI action so as to include the analogous of the $heta $ term, showing that Witten formula for the dyon charge also holds in DBI theories.