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<p>We introduce multi-jet merging for deep inelastic scattering in the V<span>incia</span> parton shower in the Monte Carlo event generator P<span>ythia</span> 8. Merging combines event samples of different parton multiplicities with logarithmically enhanced parton-shower radiation. We consider up to five outgoing partons using two different merging algorithms. We vary the relevant scale choices and compare to experimental data by the H1 collaboration at the HERA collider. Results show that multi-jet merging improves the description to data, especially for low virtuality events, and that jet cross-sections converge when the partonic multiplicity exceeds the number of reconstructed jets.</p>

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Multi-jet production in deep inelastic scattering with Pythia

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月16日

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  • Ilkka Helenius,
  • Joni O. Laulainen,
  • Christian T. Preuss

摘要

We introduce multi-jet merging for deep inelastic scattering in the Vincia parton shower in the Monte Carlo event generator Pythia 8. Merging combines event samples of different parton multiplicities with logarithmically enhanced parton-shower radiation. We consider up to five outgoing partons using two different merging algorithms. We vary the relevant scale choices and compare to experimental data by the H1 collaboration at the HERA collider. Results show that multi-jet merging improves the description to data, especially for low virtuality events, and that jet cross-sections converge when the partonic multiplicity exceeds the number of reconstructed jets.