QCD Corrections to Diboson Production

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Abstract

The QCD radiative corrections to hadronic diboson production are reviewed. The radiative corrections for \(W^{\pm}\gamma\), \(Z\gamma\), \(ZZ\), \(W^+W^-\), and \(W^{\pm} Z\) are discussed. Similarities and differences in the behavior of the order \(\alpha_s\) cross sections for these processes are emphasized.

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QCD Corrections to Hadronic \(W\gamma\) Production with Non-standard \(WW\gamma\) Couplings

U Baur, Tao Han, J. Ohnemus (1993)

The process \(p \pbar \rightarrow W^{\pm}\gamma + X \rightarrow \ell^\pm \nu \gamma + X\) is calculated to \({\cal O}(\alpha_s)\) for general \(CP\) conserving \(WW\gamma\) couplings. At the Tevatron center of mass energy, the QCD corrections to \(W\gamma\) production are modest, and the Born and inclusive \({\cal O}(\alpha_s)\) cross sections have similar sensitivities to the effects of anomalous couplings. At supercollider energies, the inclusive QCD corrections are large at high photon transverse momenta, reducing the sensitivity to non-standard \(WW\gamma\) couplings by up to a factor~2. The size of the QCD corrections can be reduced significantly, and a large fraction of the sensitivity lost can be regained, if a jet veto is imposed.

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Amplitude Zeros in \(W^\pm Z\) Production

J. Ohnemus, Tao Han, U Baur (1994)

We demonstrate that the Standard Model amplitude for \(f_1 \bar f_2 \rightarrow W^\pm Z \) at the Born-level exhibits an approximate zero located at \(\cos\theta = (g^{f_1}_{-} + g^{f_2}_{-}) / (g^{f_1}_{-} - g^{f_2}_{-})\) at high energies, where the \(g^{f_i}_{-}\) (\(i=1,2\)) are the left-handed couplings of the \(Z\)-boson to fermions and \(\theta\) is the center of mass scattering angle of the \(W\)-boson. The approximate zero is the combined result of an exact zero in the dominant helicity amplitudes \({\cal M}(\pm,\mp)\) and strong gauge cancelations in the remaining amplitudes. For non-standard \(WWZ\) couplings these cancelations no longer occur and the approximate amplitude zero is eliminated.

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Publication date Created: 20 March 1995

Publication date Updated: 1995-03-21

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DOI: 10.1063/1.49291

ArXiV ID: hep-ph/9503389

SO-VID: 28407005-c46f-4a65-9efa-71f2109ebfa2

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Report No UCD-95-9

Comments Latex file uses epsfig.sty, 12 postscript figures (uuencoded) will be added with figures command. Full postscript version, complete with embedded figures, is available at ftp://ucdhep.ucdavis.edu/ohnemus/ucd-95-9/ucd-95-9.ps . To appear in the Proceedings of the International Symposium on Vector Boson Self-Interactions, UCLA, Feb. 1--3, 1995.

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QCD Corrections to Diboson Production

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SDG: 12: Responsible Consumption and Production

Most cited references 2

QCD Corrections to Hadronic \(W\gamma\) Production with Non-standard \(WW\gamma\) Couplings

Amplitude Zeros in \(W^\pm Z\) Production

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