https://doi.org/10.1140/epjc/s10052-007-0296-5
Regular Article - Experimental Physics
Inclusive D*± meson and associated dijet production in deep-inelastic scattering at HERA
1
I. Physikalisches Institut, RWTH, Aachen, Germany
2
Vinca Institute of Nuclear Sciences, Belgrade, Serbia
3
School of Physics and Astronomy, University of Birmingham, Birmingham, UK
4
Inter-University Institute for High Energies ULB-VUB, Brussels, Universiteit Antwerpen, Antwerpen, Belgium
5
Rutherford Appleton Laboratory, Chilton, Didcot, UK
6
Institute for Nuclear Physics, Cracow, Poland
7
Institut für Physik, Universität Dortmund, Dortmund, Germany
8
Joint Institute for Nuclear Research, Dubna, Russia
9
CEA, DSM/DAPNIA, CE-Saclay, Gif-sur-Yvette, France
10
DESY, Hamburg, Germany
11
Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany
12
Max-Planck-Institut für Kernphysik, Heidelberg, Germany
13
Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany
14
Kirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany
15
Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovak Republic
16
Department of Physics, University of Lancaster, Lancaster, UK
17
Department of Physics, University of Liverpool, Liverpool, UK
18
Queen Mary and Westfield College, London, UK
19
Physics Department, University of Lund, Lund, Sweden
20
CPPM, CNRS/IN2P3 – Univ. Mediterranee, Marseille, France
21
Departamento de Fisica Aplicada, CINVESTAV, Merida, Yucatan, Mexico
22
Departamento de Fisica, CINVESTAV, Merida, Yucatan, Mexico
23
Institute for Theoretical and Experimental Physics, Moscow, Russia
24
Lebedev Physical Institute, Moscow, Russia
25
Max-Planck-Institut für Physik, München, Germany
26
LAL, Université de Paris-Sud 11, IN2P3-CNRS, Orsay, France
27
LLR, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France
28
LPNHE, Universités Paris VI and VII, IN2P3-CNRS, Paris, France
29
Faculty of Science, University of Montenegro, Podgorica, Montenegro
30
Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic
31
Faculty of Mathematics and Physics, Charles University, Praha, Czech Republic
32
Dipartimento di Fisica, Università di Roma Tre and INFN Roma 3, Roma, Italy
33
Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
34
Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
35
Paul Scherrer Institut, Villigen, Switzerland
36
Fachbereich C, Universität Wuppertal, Wuppertal, Germany
37
Yerevan Physics Institute, Yerevan, Armenia
38
DESY, Zeuthen, Germany
39
Institut für Teilchenphysik, ETH, Zürich, Switzerland
40
Physik-Institut, Universität Zürich, Zürich, Switzerland
41
Physics Department, National Technical University, Zografou Campus, 15773, Athens, Greece
42
Rechenzentrum, Universität Wuppertal, Wuppertal, Germany
43
University of P.J. Šafárik, Košice, Slovak Republic
44
CERN, Geneva, Switzerland
45
Max-Planck-Institut für Physik, München, Germany
46
Comenius University, Bratislava, Slovak Republic
* e-mail: obehnke@mail.desy.de
Received:
16
January
2007
Revised:
6
March
2007
Published online:
26
May
2007
Inclusive D*± production is measured in deep-inelastic ep scattering at HERA with the H1 detector. In addition, the production of dijets in events with a D*± meson is investigated. The analysis covers values of photon virtuality 2 ≤ Q2 ≤ 100 GeV2 and of inelasticity 0.05≤y≤0.7. Differential cross sections are measured as a function of Q2 and x and of various D*± meson and jet observables. Within the experimental and theoretical uncertainties all measured cross sections are found to be adequately described by next-to-leading order (NLO) QCD calculations, based on the photon–gluon fusion process and DGLAP evolution, without the need for an additional resolved component of the photon beyond what is included at NLO. A reasonable description of the data is also achieved by a prediction based on the CCFM evolution of partons involving the kT-unintegrated gluon distribution of the proton.
© Springer-Verlag Berlin Heidelberg, 2007