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QCD Corrections to $gammagamma o ZZ$ at Small Scattering Angles | | Grigorios Chachamis
; Krisztian Peters
; | | Date: |
4 Sep 2003 | | Journal: | Phys.Lett. B580 (2004) 169-176 DOI: 10.1016/j.physletb.2003.11.045 | | Subject: | hep-ph | | Abstract: | QCD corrections to the electroweak cross section of $gammagamma o ZZ$ 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. | | Source: | arXiv, hep-ph/0309043 | | Services: | Forum | Review | PDF | Favorites | |
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