Gravitational effects on critical Q-ballsD. Metaxas
Department of Physics, National Technical University of Athens - Zografou Campus, 15780 Greece
received 3 October 2006; accepted in final form 7 March 2007; published April 2007
published online 29 March 2007
In a cosmological phase transition in theories that admit Q-balls there is a value of the soliton charge above which the soliton becomes unstable and expands, converting space to the true vacuum, much like a critical bubble in the case of ordinary tunneling. Here I consider the effects of gravity on these solitons and I calculate the lowest gravitational corrections to the critical radius and charge.
11.27.+d - Extended classical solutions; cosmic strings, domain walls, texture.
© Europhysics Letters Association 2007