<img src="/content/84176U3215550P29/MediaObjects/13130_2012_3361_Figa_HTML.gif" border="0" />Measurement of charm production at central rapidity in proton-proton collisions at class="latex">class="ss">ce="symbol">脰<i>si> = 7
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摘要
The p t-differential inclusive production cross sections of the prompt charmed mesons D0, D+, and D*+ in the rapidity range |y| < 0.5 were measured in proton-proton collisions at 脰s = 7 TeV \sqrt {s} = 7{ }TeV at the LHC using the ALICE detector. Reconstructing the decays D0 → K−π+, D+ → K−π+π+, D*+ → D0π+, and their charge conjugates, about 8,400 D0, 2,900 D+, and 2,600 D*+ mesons with 1 < p t < 24 GeV/c were counted, after selection cuts, in a data sample of 3.14 脳 108 events collected with a minimum-bias trigger (integrated luminosity L int = 5 nb−1). The results are described within uncertainties by predictions based on perturbative QCD.

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