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

Abstract : 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.
Type de document :
Pré-publication, Document de travail
SUBATECH-Plasma. 28 pages, 9 captioned figures, 4 tables, authors from page 23, submitted to EPJC, figures at http.. 2017
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http://hal.in2p3.fr/in2p3-01454731
Contributeur : Sylvie Flores <>
Soumis le : vendredi 3 février 2017 - 08:30:33
Dernière modification le : mardi 16 janvier 2018 - 16:36:59

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  • HAL Id : in2p3-01454731, version 1
  • ARXIV : 1702.00766

Citation

S. Acharya, A. Baldisseri, H. Borel, J. Castillo Castellanos, J.L. Charvet, et al.. Measurement of D-meson production at mid-rapidity in pp collisions at $\mathbf{\sqrt{s}=7}$ TeV. SUBATECH-Plasma. 28 pages, 9 captioned figures, 4 tables, authors from page 23, submitted to EPJC, figures at http.. 2017. 〈in2p3-01454731〉

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