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<p>We report on our new models for photoproduction and electroproduction of kaons off the proton and neutron target, focusing first on the <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(K^+\Lambda \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msup> <mi>K</mi> <mo>+</mo> </msup> <mi mathvariant="normal">Λ</mi> </mrow> </math></EquationSource> </InlineEquation> channel and then extending the analysis to <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\Sigma \)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">Σ</mi> </math></EquationSource> </InlineEquation> 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.</p>

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Electromagnetic Production of Hyperons

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月30日

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  • Dalibor Skoupil,
  • Petr Bydžovský,
  • Aleš Cieplý,
  • Dimitrios Petrellis,
  • Sophia Stibůrková

摘要

We report on our new models for photoproduction and electroproduction of kaons off the proton and neutron target, focusing first on the \(K^+\Lambda \) K + Λ channel and then extending the analysis to \(\Sigma \) Σ 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.