A comparative study of flavour-sensitive observables in hadronic Higgs decays
arxiv(2024)
摘要
Jet production from hadronic Higgs decays at future lepton colliders will
have significantly different phenomenological implications than jet production
via off-shell photon and Z-boson decays, owing to the fact that Higgs bosons
decay to both pairs of quarks and gluons. We compute observables involving
flavoured jets in hadronic Higgs decays to three partons at Born level
including next-to-leading order corrections in QCD (i.e up to
𝒪(α_S^2)). The calculation is performed in the
framework of an effective theory in which the Higgs boson couples directly to
gluons and massless b-quarks retaining a non-vanishing Yukawa coupling. For
the energy of the leading and subleading flavoured jet, the angular separation
and the invariant mass of the leading b-b̅ pair, we contrast the
results obtained in both Higgs decay categories and using either of the
infrared-safe flavoured jet algorithms flavour-k_T and
flavour-dressing.
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