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Preprint/Internal Report DESY-2014-02882
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Measurement of D* photoproduction at three different centre-of-mass energies at HERA

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2014

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Report No.: DESY-14-082; arXiv:1405.5068

Abstract: The photoproduction of D$^{∗±}$ mesons has been measured with the ZEUS detector at HERA at three different ep centre-of-mass energies, $ \sqrt{s} $ , of 318, 251 and 225 GeV. For each data set, D$^{∗±}$ mesons were required to have transverse momentum, p$_{T}^{D}^{ ∗}$ , and pseudo-rapidity, η$^{D}^{∗}$, in the ranges 1.9 < p$_{T}^{D}^{ ∗}$ < 20 GeV and |η$^{D}^{∗}$| < 1.6. The events were required to have a virtuality of the incoming photon, Q$^{2}$, of less than 1 GeV$^{2}$. The dependence on $ \sqrt{s} $ was studied by normalising to the high-statistics measurement at $ \sqrt{s}=318 $ GeV. This led to the cancellation of a number of systematic effects both in data and theory. Predictions from next-to-leading-order QCD describe the $ \sqrt{s} $ dependence of the data well.

Keyword(s): Lepton-Nucleon Scattering (LCSH) ; QCD (LCSH) ; Heavy quark production (LCSH) ; Charm physics (LCSH) ; higher-order: 1 ; D*(2010): photoproduction ; DESY HERA Stor ; quantum chromodynamics ; transverse momentum ; rapidity ; ZEUS ; electron p: scattering ; D*(2010): hadronic decay ; channel cross section: measured ; energy dependence ; experimental results ; 225: 251: 318 GeV-cms


Note: 17 pages, 7 figures, to submit to JHEP
Contributing Institute(s):
  1. ZEUS Kollaboration (ZEUS)
Research Program(s):
  1. Experiments at HERA (ZEUS) (POF2-511) (POF2-511)
Experiment(s):
  1. HERA: ZEUS

Appears in the scientific report 2014
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OpenAccess ; Published
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http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article/Internal Report  ;  ;  ; et al
Measurement of $D^{\ast}$ photoproduction at three different centre-of-mass energies at HERA
Journal of high energy physics 2014(10), 3 () [10.1007/JHEP10(2014)003]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

 Record created 2014-06-19, last modified 2021-11-10
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