https://doi.org/10.1140/epjc/s10052-009-1088-x
Regular Article - Experimental Physics
Measurement of D ± and D 0 production in deep inelastic scattering using a lifetime tag at HERA
1
Argonne National Laboratory, Argonne, IL, 60439-4815, USA
2
Andrews University, Berrien Springs, MI, 49104-0380, USA
3
INFN Bologna, Bologna, Italy
4
University and INFN Bologna, Bologna, Italy
5
Physikalisches Institut der Universität Bonn, Bonn, Germany
6
H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK
7
Department of Physics, Panjab University, Chandigarh, India
8
Physics Department and INFN, Calabria University, Cosenza, Italy
9
Chonnam National University, Kwangju, South Korea
10
Jabatan Fizik, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
11
Nevis Laboratories, Columbia University, Irvington on Hudson, NY, 10027, USA
12
The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
13
Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Cracow, Poland
14
Department of Physics, Jagellonian University, Cracow, Poland
15
Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
16
Deutsches Elektronen-Synchrotron DESY, Zeuthen, Germany
17
INFN Florence, Florence, Italy
18
University and INFN Florence, Florence, Italy
19
Fakultät für Physik der Universität Freiburg i.Br., Freiburg im Breisgau, Germany
20
Department of Physics and Astronomy, University of Glasgow, Glasgow, UK
21
Department of Engineering in Management and Finance, Univ. of Aegean, Mytilene, Greece
22
Institute of Exp. Physics, Hamburg University, Hamburg, Germany
23
High Energy Nuclear Physics Group, Imperial College London, London, UK
24
Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan
25
Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan
26
Institute for Nuclear Research, National Academy of Sciences, Kiev and Kiev National University, Kiev, Ukraine
27
Center for High Energy Physics, Kyungpook National University, Daegu, South Korea
28
Institut de Physique Nucléaire, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
29
Departamento de Física Teórica, Universidad Autónoma de Madrid, Madrid, Spain
30
Department of Physics, McGill University, Montréal, Québec, H3A 2T8, Canada
31
Faculty of General Education, Meiji Gakuin University, Yokohama, Japan
32
Moscow Engineering Physics Institute, Moscow, Russia
33
Institute of Nuclear Physics, Moscow State University, Moscow, Russia
34
Max-Planck-Institut für Physik, Munich, Germany
35
NIKHEF and University of Amsterdam, Amsterdam, Netherlands
36
Physics Department, Ohio State University, Columbus, OH, 43210, USA
37
Department of Physics, University of Oxford, Oxford, UK
38
INFN Padova, Padova, Italy
39
Dipartimento di Fisica dell’ Università and INFN, Padova, Italy
40
Department of Physics, Pennsylvania State University, University Park, PA, 16802, USA
41
Polytechnic University, Sagamihara, Japan
42
Dipartimento di Fisica, Università ‘La Sapienza’ and INFN, Rome, Italy
43
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, UK
44
Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv, Israel
45
Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
46
Department of Physics, University of Tokyo, Tokyo, Japan
47
Department of Physics, Tokyo Metropolitan University, Tokyo, Japan
48
Università di Torino and INFN, Torino, Italy
49
Università del Piemonte Orientale, Novara, and INFN, Torino, Italy
50
Department of Physics, University of Toronto, Toronto, Ontario, M5S 1A7, Canada
51
Physics and Astronomy Department, University College London, London, UK
52
Institute of Experimental Physics, Warsaw University, Warsaw, Poland
53
Institute for Nuclear Studies, Warsaw, Poland
54
Department of Particle Physics, Weizmann Institute, Rehovot, Israel
55
Department of Physics, University of Wisconsin, Madison, WI, 53706, USA
56
Department of Physics, York University, Ontario, M3J 1P3, Canada
* e-mail: tobias.haas@desy.de
Received:
7
February
2009
Revised:
28
April
2009
Published online:
11
August
2009
The production of D
±- and D
0-mesons has been measured with the ZEUS detector at HERA using an integrated luminosity of 133.6 pb−1. The measurements cover the kinematic range 5<Q
2<1000 GeV2, 0.02<y<0.7, 1.5<p
T
D
<15 GeV and |η
D
|<1.6. Combinatorial background to the D-meson signals is reduced by using the ZEUS microvertex detector to reconstruct displaced secondary vertices. Production cross sections are compared with the predictions of next-to-leading-order QCD, which is found to describe the data well. Measurements are extrapolated to the full kinematic phase space in order to obtain the open-charm contribution,
, to the proton structure function, F
2.
© Springer-Verlag / Società Italiana di Fisica, 2009