Monopoles, dyons and theta term in Dirac-Born-Infeld theory

N.E. GRANDI; A. PAKMAN; F.A. SCHAPOSNIK; G.A. SILVA

PHYSICAL REVIEW D - PARTICLE AND FILDS

Año: 1999 vol. 60 p. 125002 - 125010

0556-2821

We present dyon solutions to an SU(2) Dirac-Born-Infeld (DBI) gauge theory coupled to a Higgs triplet. We consider different non-Abelian extensions of the DBI action and study the resulting solutions numerically, comparing them with the standard Julia-Zee dyons. We discuss the existence of a critical value of â, the Born-Infeld absolute field parameter, below which the solution ceases to exist. We also analyze the effect of modifying the DBI action so as to include the analogous of the è term, showing that Witten formula for the dyon charge also holds in DBI theories.