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Higgs boson production and quark scattering amplitudes at high energy through the next-to-next-to-leading power in quark mass
A bstract We study the amplitudes of the quark scattering by an external electromagnetic field and of the light quark mediated Higgs boson production via gluon fusion in the high-energy limit. The asymptotic behavior of the quark form factors is obtained in the double-logarithmic approximation to all orders in strong …