Nonlinear Breit-Wheeler pair production in collisions of bremsstrahlung <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>γ</mml:mi></mml:mrow></mml:math> quanta and a tightly focused laser pulse
Physical review. D/Physical review. D.