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Diboson production in the SMEFT from gluon fusion
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abstract
Precision measurements of diboson production at the LHC is an important probe of the limits of the Standard Model. The gluon-fusion channel of this process offers a connection between the Higgs and top sectors. We study in a systematic way gluon-induced diboson production in the Standard Model Effective Field Theory. We compute the amplitudes of double Higgs, double $Z/W$ and associated $ZH$ production at one loop and with up to one insertion of a dimension-6 operator. We study their high-energy limit and identify to which operators each channel could be most sensitive. To illustrate the relevance of these processes, we perform a phenomenological study of associated $ZH$ production. We show that for some top operators the gluon-induced channel can offer competitive sensitivity to constraints obtained from top quark production processes.
Forward citations
Cited by 2 Pith papers
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Dimension-8 operators in $W^+W^-$ production via gluon fusion
The full set of CP-even dimension-8 SMEFT amplitudes for gluon-fusion W+W- production is computed; their SM interference is shown to be negligible under EFT hierarchy, and new operator constraints are derived.
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Precise predictions for double Higgs production in association with a vector boson in Effective Field Theory
First NNLO QCD cross sections for pp→Vhh in SMEFT and HEFT, provided as interpolated coefficients; W±hh K-factors are almost EFT-independent while Zhh is sensitive to gluon-initiated contributions.
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