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arXiv · hep-ph/0309043

QCD Corrections to $γγ\to ZZ$ at Small Scattering Angles

Grigorios Chachamis·Krisztian Peters
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Abstract

QCD corrections to the electroweak cross section of $γγ\to ZZ$ at high energies and small scattering angles have been calculated. The dominant contributions are due to $t$-channel gluon exchange, i.e. photons dissociate into quark-antiquark pairs giving rise to two colour dipoles which interact through gluons. Corrections resulting from the leading log BFKL amplitude are of the order of a few percent close to the forward region already at the 1 TeV energy range and are rising with the scattering energy. We also considered the helicity non-conserving cases in which the QCD corrections in comparison to the electroweak part of the amplitude strongly grow with energy. The helicity non-conserving scattering process is of particular interest since it is sensitive to the Higgs sector.

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Grigorios Chachamis, Krisztian Peters. 2003-09-04. QCD Corrections to $γγ\to ZZ$ at Small Scattering Angles. https://doi.org/10.1016/j.physletb.2003.11.045

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