Measurement of ${{\mathrm{D}}^0}$, ${{\mathrm{D}}^+}$, ${{\mathrm{D}}^{*+}}$ and ${{\mathrm{D}}^+_{\mathrm{s}}}$ production in pp collisions at ${\sqrt{{\textit{s}}}~=~5.02~{\text {TeV}}}$ with ALICE
The measurements of the production of prompt D 0 , D + , D *+ , and D$_s^+$ mesons in proton–proton (pp) collisions at $\sqrt{s}$=5.02 TeV with the ALICE detector at the Large Hadron Collider (LHC) are reported. D mesons were reconstructed at mid-rapidity (|y| < 0.5) via their hadronic decay channels D 0 → K - $π$ + , D + → K - $π$ + $π$ + , D *+ → D 0 $π$ + → K - $π$ + $π$ + , D$_s^+$ → Φ$π$ + → K + K - $π$ + , and their charge conjugates. The production cross sections were measured in the transverse momentum interval 0 < $p$T < 36 GeV/$c$ for D 0 , 1 < $p$T < 36 GeV/$c$ for D + and D *+ , and in 2 < $p$T < 24 GeV/$c$ for D$_s^+$ mesons. Thanks to the higher integrated luminosity, an analysis in finer $p$T bins with respect to the previous measurements at $\sqrt{s}$ = 7 TeV was performed, allowing for a more detailed description of the cross-section $p$T shape. The measured $p$T differential production cross sections are compared to the results at √ s = 7 TeV and to four different perturbative QCD calculations. Its rapidity dependence is also tested combining the ALICE and LHCb measurements in pp collisions at $\sqrt{s}$ = 5.02 TeV. This measurement will allow for a more accurate determination of the nuclear modification factor in p–Pb and Pb–Pb collisions performed at the same nucleon– nucleon centre-of-mass energy.