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<p>While significant effort has been devoted to precision calculations of the production of two Higgs bosons via gluon fusion, the treatment of their decays in this process has only recently begun to attract attention. It has been found that fixed-order QCD corrections to fiducial di-Higgs decay rates involving the <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(b\overline{b }\)</EquationSource> </InlineEquation> decay channel can be substantial. Considering <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(HH\to b\overline{b }\gamma \gamma \)</EquationSource> </InlineEquation>, we show that such corrections arise predominantly from sensitivity to soft and collinear QCD radiation at fixed order, and that they are largely washed out once parton showers are included.</p>

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Do large QCD corrections to di-Higgs decay survive parton showering? A study of \(HH\to b\overline{b }\gamma \gamma \)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月19日

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  • Jens Braun,
  • Duarte Fontes,
  • Gudrun Heinrich

摘要

While significant effort has been devoted to precision calculations of the production of two Higgs bosons via gluon fusion, the treatment of their decays in this process has only recently begun to attract attention. It has been found that fixed-order QCD corrections to fiducial di-Higgs decay rates involving the \(b\overline{b }\) decay channel can be substantial. Considering \(HH\to b\overline{b }\gamma \gamma \) , we show that such corrections arise predominantly from sensitivity to soft and collinear QCD radiation at fixed order, and that they are largely washed out once parton showers are included.