Brane Q-ball, branonium and brane Q-ball inflation

We consider a time-dependent brane configuration that corresponds to the Q-ball in the effective Lagrangian. We discuss the brane Q-balls, branonium and brane Q-ball inflation, which might have the same origin. We show the allowed parameter regions for these configurations. It is shown that the brane Q-ball looks similar to a conventional Q-ball when it is large, but its decay is dominated by the radiation into the bulk of the extra dimensions when it exceeds a critical size.