Abstract
Recently, Jarah has constructed the kink form factor relevant to the scattering of an ultrarelativistic meson with an arbitrary nonrelativistic scalar kink. However the formula was only applied to the Sine-Gordon model, where the form factor was long ago determined by Weisz using integrability. In this paper, using various known analytic results for the (1+1)-dimensional real scalar $\Phi^4$ model and a kink wave packet construction, we analytically calculate the leading quantum correction to the form factor of the $\Phi^4$ kink. We discuss its properties in general and also in the ultra-relativistic meson case and provide a numerical check of our results.
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