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Mixed electroweak-QCD corrections to e^+e^-to HZ at Higgs factory

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arxiv 1609.03995 v2 pith:MSXDLZVF submitted 2016-09-13 hep-ph hep-ex

Mixed electroweak-QCD corrections to e^+e^-to HZ at Higgs factory

classification hep-ph hep-ex
keywords correctionshiggselectroweak-qcdmixedorderpercentprecisionaccuracy
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The prospective Higgs factories, exemplified by ILC, FCC-ee and CEPC, plan to conduct the precision Higgs measurements at the $e^+e^-$ center-of-mass energy around 250 GeV. The cross sections for the dominant Higgs production channel, the Higgsstrahlung process, can be measured to a (sub-) percent accuracy. Merely incorporating the well-known next-to-leading order (NLO) electroweak corrections appears far from sufficient to match the unprecedented experimental precision. In this work, we make an important advancement toward this direction by investigating the mixed electroweak-QCD corrections to $e^+e^-\to HZ$ at next-to-next-to-leading order (NNLO) for both unpolarized and polarized $Z$ boson. The corrections turn out to reach one percent level of the Born-order results, thereby must be incorporated in the future confrontation with the data.

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