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Measurement of D ⁎± , D ± and Ds± meson production cross sections in pp collisions at s=7 TeV with the ATLAS detector

CERN İşbirliği


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    <subfield code="a">&lt;p&gt;The production of D⁎± , D± and Ds± charmed mesons has been measured with the ATLAS detector in pp collisions at s=7 TeV at the LHC, using data corresponding to an integrated luminosity of 280 nb−1 . The charmed mesons have been reconstructed in the range of transverse momentum 3.5&amp;lt;pT(D)&amp;lt;100 GeV and pseudorapidity |η(D)|&amp;lt;2.1 . The differential cross sections as a function of transverse momentum and pseudorapidity were measured for D⁎± and D± production. The next-to-leading-order QCD predictions are consistent with the data in the visible kinematic region within the large theoretical uncertainties. Using the visible D cross sections and an extrapolation to the full kinematic phase space, the strangeness-suppression factor in charm fragmentation, the fraction of charged non-strange D mesons produced in a vector state, and the total cross section of charm production at s=7 TeV were derived.&lt;/p&gt;</subfield>
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