Measurement of D-meson production at mid-rapidity in pp collisions at $\mathbf{\sqrt{s}=7}$ TeV

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2017, Vol.77
• Main Authors: Acharya, S., Baldisseri, A., Borel, H., Castellanos, J. Castillo, Charvet, J.L., Feuillard, V.J.G., Lardeux, A., Panebianco, S., Costa, H. Pereira Da, Rakotozafindrabe, A., Aphecetche, Laurent, Audurier, B., Batigne, Guillaume, Erazmus, B., Francisco, A., Germain, Marie, Martinez Garcia, Gines, Morreale, A., Pillot, Philippe, Ronflette, L., Schutz, Y., Shabetai, Alexandre, Stocco, Diego, Cheshkov, C., Cheynis, B., Ducroux, L., Teyssier, B., Tieulent, R., Uras, A., Belikov, I., Kuhn, C., Maire, A., Rami, F., Roy, C., Senyukov, S., Vernet, R., Valle, Z. Conesa Del, Das, I., Espagnon, B., Hadjidakis, C., Lakomov, I., Suire, C., Takaki, J. D. Tapia, Tarhini, M., Valencia Palomo, L.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-017-5090-4

The production cross sections of the prompt charmed mesons ${\rm D^0}$, ${\rm D^+}$, ${\rm D^{*+}}$ and ${\rm D_s^+}$ were measured at mid-rapidity in proton-proton collisions at a centre-of-mass energy $\sqrt{s}=7$ TeV with the ALICE detector at the Large Hadron Collider (LHC). D mesons were reconstructed from their decays ${\rm D}^0 \to {\rm K}^-\pi^+$, ${\rm D}^+\to {\rm K}^-\pi^+\pi^+$, ${\rm D}^{*+} \to {\rm D}^0 \pi^+$, ${\rm D_s^{+}\to \phi\pi^+\to K^-K^+\pi^+}$, and their charge conjugates. With respect to previous measurements in the same rapidity region, the coverage in transverse momentum ($p_{\rm T}$) is extended and the uncertainties are reduced by a factor of about two. The accuracy on the estimated total $\rm c\overline c$ production cross section is likewise improved. The measured $p_{\rm T}$-differential cross sections are compared with the results of three perturbative QCD calculations.