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Measurement of D ± production in deep inelastic ep scattering with the ZEUS detector at HERA
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Zeitschriftentitel: | Journal of High Energy Physics |
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In: | Journal of High Energy Physics, 2013, 2013, 5 |
Format: | E-Article |
Sprache: | Englisch |
veröffentlicht: |
Springer Science and Business Media LLC
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Schlagwörter: |
Zusammenfassung: | <jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>Charm production in deep inelastic <jats:italic>ep</jats:italic> scattering was measured with the ZEUS detector using an integrated luminosity of 354 pb<jats:sup>−1</jats:sup>. Charm quarks were identified by reconstructing <jats:italic>D</jats:italic> <jats:sup>±</jats:sup> mesons in the <jats:italic>D</jats:italic> <jats:sup>±</jats:sup> → <jats:italic>K</jats:italic> <jats:sup>∓</jats:sup>π<jats:sup>±</jats:sup>π<jats:sup>±</jats:sup> decay channel. Lifetime information was used to reduce combinatorial background substantially. Differential cross sections were measured in the kinematic region 5 <jats:italic>< Q</jats:italic> <jats:sup>2</jats:sup> <jats:italic><</jats:italic> 1000 GeV<jats:sup>2</jats:sup>, 0<jats:italic>.</jats:italic>02 <jats:italic>< y <</jats:italic> 0<jats:italic>.</jats:italic>7, 1<jats:italic>.</jats:italic>5 <jats:italic>< p</jats:italic> <jats:sub>T</jats:sub> (<jats:italic>D</jats:italic> <jats:sup>±</jats:sup>) <jats:italic><</jats:italic> 15 GeV and |<jats:italic>η</jats:italic>(<jats:italic>D</jats:italic> <jats:sup>±</jats:sup>)| <jats:italic><</jats:italic> 1<jats:italic>.</jats:italic>6, where <jats:italic>Q</jats:italic> <jats:sup>2</jats:sup> is the photon virtuality, <jats:italic>y</jats:italic> is the inelasticity, and <jats:italic>p</jats:italic> <jats:sub>T</jats:sub> (<jats:italic>D</jats:italic> <jats:sup>±</jats:sup>) and <jats:italic>η</jats:italic>(<jats:italic>D</jats:italic> <jats:sup>±</jats:sup>) are the transverse momentum and the pseudorapidity of the <jats:italic>D</jats:italic> <jats:sup>±</jats:sup> meson, respectively. Next-to-leading-order QCD predictions are compared to the data. The charm contribution, <jats:inline-formula> <jats:tex-math>$ F_2^{{c\overline{c}}} $</jats:tex-math> </jats:inline-formula>, to the proton structure-function <jats:italic>F</jats:italic> <jats:sub>2</jats:sub> was extracted.</jats:p> |
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ISSN: |
1029-8479
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DOI: | 10.1007/jhep05(2013)023 |