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

Journal article published in 2017 by Dagmar Adamova, Madan Mohan Aggarwal, Gianluca Aglieri Rinella, Michelangelo Agnello, Neelima Agrawal, Zubayer Ahammed, Nazeer Ahmad, Sang Un Ahn, Salvatore Aiola, Alexander Akindinov, Sk Noor Alam, Danilo Silva De Albuquerque, Dmitry Aleksandrov, Bruno Alessandro, Didier Alexandre and other authors.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

The production cross sections of the prompt charmed mesons D$^0$, D$^+$, D$^*+$ and 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 ${\rm D}^0\rightarrow{\rm K}^-π^+$, ${\rm D}^+\rightarrow{\rm K}^-π^+π^+$, ${\rm D}^{*+}\rightarrow{\rm D}^0π^+$, ${\rm D}_s^+→ϕπ^+→ {\rm K}^-{\rm K}^+π^+$, 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 $c{\overline c}$ production cross section is likewise improved. The measured $p_{\rm T}$-differential cross sections are compared with the results of three perturbative QCD calculations.