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 — preprints:1997:ttp97-30 [2016/03/17 11:03] (current) Line 1: Line 1: + ====== TTP97-30 Effects of Jet Azimuthal Angular Distributions on Dijet Production Cross Sections in DIS  ====== + + + A Monte Carlo study of the azimuthal angular distribution + around the virtual boson-proton beam axis for dijet events + in DIS at HERA is presented. + In the presence of typical acceptance cuts on the jets in the + laboratory frame, the azimuthal distribution + is dominated by  kinematic effects rather than the + typical $\cos\phi$ and $\cos 2\phi$ dependence + predicted by the  QCD matrix elements. + This implies that the $\phi$ dependent part + of the QCD matrix elements contributes even to the dijet  production + cross section. Neglecting this $\phi$ dependence + leads to an error of about 5-8\% in the production cross + section for typical acceptance cuts in the laboratory frame. + We also present first NLO results on the $\phi$-decorrelation + of the jets through NLO effects. + + + |**Erwin Mirkes and Stefan Willfahrt**  | + |** Phys. Lett. B414 205-209 1997  **  | + | {{preprints:1997:ttp97-30.pdf|PDF}} {{preprints:1997:ttp97-30.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9708231|arXiv]]   | + | |