Electromagnetic Production of Hyperons

Abstract We report on our new models for photoproduction and electroproduction of kaons off the proton and neutron target, focusing first on the $$K^+\Lambda $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mi>Λ</mml:mi> </mml:mrow> </mml:math> channel and then extending the analysis to $$\Sigma $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Σ</mml:mi> </mml:math> photoproduction channels. For the proper treatment of the exchanges of higher-spin resonances, we opted for the so-called consistent formalism and in order to partially account for the unitarity corrections at the tree level, we introduced energy-dependent widths of nucleon resonances. For selecting the appropriate set of resonances, we used regularization methods known from machine learning, the Least Absolute Shrinkage Selection Operator and Ridge regression.