21 research outputs found

    Measurement of D+- and D0 production in deep inelastic scattering using a lifetime tag at HERA

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    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 |eta(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, F-2(c (c) over bar), to the proton structure function, F-2

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    Die beruflichen Hautkrankheiten

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    Gewässerbelastungen durch organische Stoffe

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    PuK im Planungs- und Kontrollsystem von Unternehmungen mit primär verrichtungs-orientierter (funktionaler) Aufbauorganisation

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    Diffractive photoproduction of D*(+/-) (2010) at HERA

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    Measurement of beauty production from dimuon events at HERA

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