Riedl, Johann and Stratmann, Marco and Schaefer, Andreas (2013) Longitudinally polarized photoproduction of heavy flavors at next-to-leading order of QCD. EUROPEAN PHYSICAL JOURNAL C, 73 (3): 2360. ISSN 1434-6044,
Full text not available from this repository. (Request a copy)Abstract
We present a phenomenological study of charm quark photoproduction in longitudinally polarized lepton-hadron collisions at next-to-leading order accuracy of QCD. Our results are based on a recently developed, flexible parton-level Monte Carlo program for spin-dependent heavy flavor hadroproduction, which we extend to deal also with both direct and resolved photon contributions. The subsequent hadronization into charmed mesons is modeled in our calculations, which allows us to compare with data on double-spin asymmetries for D-0 meson production taken by the COMPASS collaboration. In general, next-to-leading order QCD corrections are found to be very significant and do not cancel in spin asymmetries. We elucidate the role of the individual hard scattering subprocesses and determine the range of parton momentum fractions predominantly probed for charm production at COMPASS. Theoretical uncertainties are estimated by varying renormalization and factorization scales and parameters controlling the hadronization of the charm quarks.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PHOTON-HADRON-COLLISIONS; PARTON DISTRIBUTIONS; SPLITTING FUNCTIONS; QUARK CORRELATIONS; RENORMALIZATION; FRAGMENTATION; COLLIDERS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Apr 2020 09:37 |
| Last Modified: | 23 Apr 2020 09:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17005 |
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