arXiv · hep-ph/0205126
Contribution to "Rencontres de Moriond, QCD and hadronic interactions", Les Arcs, France, March 2002
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Ulrich Schwickerath. 2002-05-14. (final) Higgs results from LEP. https://arxiv.org/abs/hep-ph/0205126
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We compute the two-loop contributions to Higgs production via gluon-gluon fusion ($gg \to h$) and Higgs decay into two photons ($h \to γγ$), arising from third-generation four-quark operators in the Standard Model effective field theory (SMEFT). Our analysis is performed in the broken phase of the theory, retaining the full dependence on the Higgs and heavy-quark masses. This includes both finite matching corrections and logarithmic effects stemming from the renormalization group evolution within the SMEFT. As a byproduct, two-loop anomalous dimensions in the SMEFT are obtained. We also briefly discuss the phenomenological implications of our two-loop calculations.
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