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New Insight into the Photoproduction of D-star meson in QCD

A. V. Berezhnoy·V. V. Kiselev·A. K. Likhoded
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Abstract

In the framework of the model motivated by perturbative calculations in the fourth $O(α^3_sα)$-order, the estimates for the $γp$ cross-section of the $D^*$-meson production in the ZEUS experiment are performed. We factorize the hadronization of $(c\bar q)$-state hardly produced in perturbative QCD, which allows us to take into account the higher twist terms in the powers of $1/p_T$ at $p_T\sim m_c$ and to correctly reproduce the c-quark fragmentation dominant at high $p_T\gg m_c$ to the given order of $α_s$. We find a good agreement with the experimental data on the photoproduction, if the color-octet $(c\bar q)$-state is taken into account, which yields $ \approx 0.33-0.49 GeV^3$.

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A. V. Berezhnoy, V. V. Kiselev, A. K. Likhoded. 1999-02-08. New Insight into the Photoproduction of D-star meson in QCD. https://arxiv.org/abs/hep-ph/9901333

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