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We derive production yields for massive pseudo-scalar and scalaraxion-like-particles (ALPs), through non-linear Compton scattering of anelectron in the background of low- and high-intensity electromagnetic fields.In particular, we focus on electromagnetic fields from Gaussian plane wavelaser pulses. A detailed study of the angular distributions and effects of thescalar and pseudo-scalar masses is presented. It is shown thatultra-relativistic seed electrons can be used to produce scalars andpseudo-scalars with masses up to the order of the electron mass. We brieflydiscuss future applications of this work towards lab-based searches for lightbeyond-the-Standard-Model particles.

ALP production through non-linear Compton scattering in intense fields