The production cross sections for prompt charmed mesons D 0, D +, D â + and Ds+ were measured at mid-rapidity in protonâproton collisions at a centre-of-mass energy s=7TeV with the ALICE detector at the Large Hadron Collider (LHC). D mesons were reconstructed from their decays D 0â K -Ï+, D +â K -Ï+Ï+, D â +â D 0Ï+, Ds++âK-K+Ï+, and their charge conjugates.With respect to previous measurements in the same rapidity region, the coverage in transverse momentum (pT) is extended and the uncertainties are reduced by a factor of about two. The accuracy on the estimated total c c Â¯ production cross section is likewise improved. The measured pT-differential cross sections are compared with the results of three perturbative QCD calculations.
|Titolo:||Measurement of D-meson production at mid-rapidity in pp collisions at sqrt(s)=7 TeV|
|Data di pubblicazione:||2017|
|Appare nelle tipologie:||1.1.1 Articolo su rivista con DOI|