Abstract
We compute the charm dijet photoproduction cross section at next-to-leading order of QCD in the zero-mass variable flavour number scheme, i.e. with active charm quarks in the proton and photon. The results are compared to recent measurements from the ZEUS experiment at HERA. The predictions for various distributions agree with the data, in particular for large momentum fractions of the partons in the photon, where direct photon processes dominate. At low momentum fractions, the predictions are quite sensitive to the charm content in the photon. The experimental data are shown to favour parameterizations with a substantial charm-quark density such as the one proposed by Cornet et al.
Similar content being viewed by others
References
H.-L. Lai et al., Phys. Rev. D 82, 074024 (2010), and the references to earlier work therein
A.D. Martin, W.J. Stirling, R.S. Thorne, G. Watt, Eur. Phys. J. C 63, 189 (2009), and the references to earlier work therein
F. Cornet, P. Jankowski, M. Krawczyk, Phys. Rev. D 70, 093004 (2004)
P. Aurenche, M. Fontannaz, J.Ph. Guillet, Eur. Phys. J. C 44, 395 (2005)
W. Slominski, H. Abramowicz, A. Levy, Eur. Phys. J. C 45, 633 (2006)
M. Glück, E. Reya, A. Vogt, Phys. Rev. D 45, 3986 (1992)
M. Glück, E. Reya, A. Vogt, Phys. Rev. D 46, 1973 (1992)
P. Aurenche, J.Ph. Guillet, M. Fontannaz, Z. Phys. C 64, 621 (1994)
S. Chekanov et al. (ZEUS Collaboration), Phys. Rev. D 76, 072011 (2007)
J. Breitweg et al. (ZEUS Collaboration), Eur. Phys. J. C 6, 67 (1999)
S. Chekanov et al. (ZEUS Collaboration), Phys. Lett. B 565, 87 (2003)
S. Chekanov et al. (ZEUS Collaboration), Nucl. Phys. B 729, 492 (2005)
S. Frixione et al., Phys. Lett. B 348, 633 (1995)
S. Frixione et al., Nucl. Phys. B 454, 3 (1995)
J. Binnewies, B.A. Kniehl, G. Kramer, Phys. Rev. D 58, 014014 (1998)
M. Klasen, G. Kramer, Z. Phys. C 72, 107 (1996)
M. Klasen, G. Kramer, Z. Phys. C 76, 67 (1997)
M. Klasen, T. Kleinwort, G. Kramer, Eur. Phys. J. direct C 1, 1 (1998)
M. Klasen, Rev. Mod. Phys. 74, 1221 (2002)
J. Pumplin et al., J. High Energy Phys. 0207, 012 (2002)
C. Amsler et al. (Particle Data Group), Phys. Lett. B 667, 1 (2008)
S. Catani et al., Nucl. Phys. B 406, 187 (1993)
S.D. Ellis, D.E. Soper, Phys. Rev. D 48, 3160 (1993)
M. Klasen, G. Kramer, Phys. Lett. B 366, 385 (1996)
S. Frixione, G. Ridolfi, Nucl. Phys. B 507, 315 (1997)
L. Gladilin, hep-ex/9912064 (1999), unpublished
S. Chekanov et al. (ZEUS Collaboration), Report DESY 03-015, February 2003, enlarged version of [11]
M. Glück, E. Reya, I. Schienbein, Phys. Rev. D 60, 054019 (1999), [Phys. Rev. D 62, 019902 (2000), Erratum]
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Klasen, M., Kramer, G. Dijet photoproduction of massless charm jets at next-to-leading order of QCD. Eur. Phys. J. C 71, 1774 (2011). https://doi.org/10.1140/epjc/s10052-011-1774-3
Received:
Revised:
Published:
DOI: https://doi.org/10.1140/epjc/s10052-011-1774-3