Abstract.
We consider the azimuthal asymmetries in semi-inclusive deep inelastic leptoproduction arising due to both perturbative and nonperturbative effects at HERMES energies and show that the \(k_T^2/Q^2\) order corrections to \(\langle \cos\phi \rangle\) and \(\langle \cos2\phi \rangle\) are significant. We also reconsider the results of perturbative effects for \(\langle \cos\phi \rangle\) at large momentum transfers [1] using the more recent sets of scale-dependent distribution and fragmentation functions, which bring up to 18% difference in \(\langle \cos\phi \rangle\). In the same approach we calculate the \(\langle \cos2\phi \rangle\) as well.
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Received: 24 October 1997 / Revised version: 10 February 1998 / Published online: 30 March 1998
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Oganessyan, K., Avakian, H., Bianchi, N. et al. Investigations of azimuthal asymmetry in semi-inclusive leptoproduction. Eur. Phys. J. C 5, 681–685 (1998). https://doi.org/10.1007/s100529800873
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DOI: https://doi.org/10.1007/s100529800873