Two-loop light fermion contribution to Higgs production and decays

By U. Aglietti, R. Bonciani, Giuseppe Degrassi, Alessandro Vicini. 2004

501 citations recorded by the source corpus.

We compute the electroweak corrections due to the light fermions to the production cross section σ(gg ! H) and to the partial decay widths ( H ! γ γ) and ( H ! g g). We present analytic results for these corrections that are expressed in terms of Generalized Harmonic Polylogarithms. We find that for the gluon fusion production cross section and for the decay width ( H ! gg) the corrections are large in the Higgs mass region below 160 GeV where they reach up to 9% of the lowest order term. For the decay width ( H ! γγ) the corrections for Higgs mass above 160 GeV can reach 10% of the lowest order term.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d9d5d5a2be8362c2a2614319516a33a1aa4cfa01

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In Nuclear and High Energy Physics

Citations in the corpus

The measurement of the Higgs self-coupling at the LHC: theoretical status (2012, unknown): “energies [67–76] (see also ref.”
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, background): “For a SM Higgs boson suffi ciently lighter than the top threshold, the NLO-EW corrections are well approximated by the contrib u ions coming from two-loop diagrams in which the Higgs couples to EW gauge bosons, which in turn co uple to the gluons via a loop of light quarks [50,712].”
Hopf algebras, coproducts and symbols: an application to Higgs boson amplitudes (2012, background): “es it was realized however that for certain multi-loop integrals new classes of transcendental functions arise that can no longer be expressed in terms of the classical polylogarithm functions, e.g., [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,”
Transverse-momentum resummation: Higgs boson production at the Tevatron and the LHC (2011, background): “The above exclusion relies on accurate theoretical predictions [7, 8] for the inclusive gg → H cross section, which is now known up to next-to-next-to-leading order (NNLO) [9– 11], with the inclusion of soft-gluon contributions up to next-to-next-to-leading logarithmic accuracy (NNLL) [12], and two-”
Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector (2015, background): “The calculation for ggF includes the complete massive top and bottom loop corrections at next-to-leading-order (NLO) QCD [93], the top quark loop corrections in the heavy-quark limit of QCD at next- to-next-to-leading-order (NNLO) [94–96], and EW loop corrections due to light quarks up to NLO [97, 9”
Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC (2012, unknown): “Next-to-leading order (NLO) electroweak (EW) corrections are applied [29, 30], as well as QCD soft-gluon re-summations at up to next-to-nextto-leading logarithm (NNLL) [31].”
Collider physics at the precision frontier (2020, methodology): “] was published. Meanwhile the order of magnitude has been conrmed by the calculations of Refs. [84{88]. Two-loop electroweak corrections to Higgs production in gluon fusion were calculated in Refs. [89, 90, 78]. The mixed QCD-EW corrections which appear at two loops for the rst time were calculated”
Higgs boson gluon–fusion production at threshold in N3LO QCD (2014, methodology): “of the renormalization scale [3]. On the basis of this belief, further reﬁnements of the cross-section with electroweak corrections and ﬁnite quark-mass eﬀects (at a ∼ 5% level of precision) followed [4]. Currently, no full computation of the hadronic Higgs-boson cross-section is available at next-t”