Measurement of D-meson production at mid-rapidity in pp collisions at \({\sqrt{s}=7}\) TeV
Acharya, Shreyasi; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Shafiq F.; Ahn, Sang Un; Aiola, Salvatore; Alme, Johan; Djuvsland, Øystein; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Velure, Arild; Zhang, Hui; Zhou, Zhuo; Zhu, Hongsheng; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Lardeux, Antoine Xavier; Lindal, Svein; Mahmood, Sohail Musa; Milosevic, Jovan; Qvigstad, Henrik; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Nesbø, Simon Voigt; Langøy, Rune; Lien, Jørgen André; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; Alfaro Molina, José Rubén; Alici, Andrea; ALICE, Collaboration
Peer reviewed, Journal article
Published version
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Permanent lenke
https://hdl.handle.net/1956/18140Utgivelsesdato
2017-08Metadata
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Originalversjon
https://doi.org/10.1140/epjc/s10052-017-5090-4Sammendrag
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.