On the radius of spatial analyticity for the 1d Dirac–Klein–Gordon equations.

We study the well-posedness of the Dirac–Klein–Gordon system in one space dimension with initial data that have an analytic extension to a strip around the real axis. It is proved that the radius of analyticity σ ( t ) of the solutions at time t cannot decay faster than 1 / t 4 as | t | → ∞ . [ABSTRACT FROM AUTHOR]