Measurement of ${\rm D^0}$, ${\rm D^+}$, ${\rm D^{*+}}$ and ${{\rm D^+_s}}$ production in pp collisions at $\mathbf{\sqrt{{\textit s}}~=~5.02~TeV}$ with ALICE
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Abstract (data abstract)
CERN-LHC. The measurements of the production of prompt $\rm{D}^{0}$, $\rm{D}^{+}$, $\rm D^{*+}$ and $\rm D_{s}$ mesons in proton-proton (pp) collisions at $\sqrt{s_{\rm{NN}}}$=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 $\rm{D^{0}}\rightarrow K\pi$, $\rm{D^{+}}\rightarrow K\pi\pi$, $\rm{D}^{*+}\rightarrow \rm{D}^{0}\pi\rightarrow K\pi\pi$, $\rm{D_{s}}\rightarrow\phi\pi\rightarrow K K \pi$, and their charge conjugates. The production cross sections were measured in the transverse momentum interval 0<$p_{\rm T}$<36 GeV/$c$ for $\rm{D}^{0}$, 1<$p_{\rm T}$<36 GeV/$c$ for $\rm{D}^{+}$ and $\rm D^{*+}$, and in 2<$p_{\rm T}$<24 GeV/$c$ for $\rm D_{s}$ mesons. Thanks to the higher integrated luminosity, an analysis in finer $p_{\rm T}$ bins with respect to the previous measurements at $\sqrt{s}$=7 Tev was performed, allowing for a more detailed description of the cross-section $p_{\rm T}$ shape. The measured $p_{\rm T}$-differential production cross sections are compared to the results at $\sqrt{s}$=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.