Measurement of D-meson production at mid-rapidity in pp collisions at √s=7 TeV

Medientyp: E-Artikel

Titel: Measurement of D-meson production at mid-rapidity in pp collisions at √s=7 TeV

Beteiligte: Acharya, Shreyasi [Verfasser:in]; Angelov, Venelin [Verfasser:in]; Arslandok, Mesut [Verfasser:in]; Danisch, Meike [Verfasser:in]; Deisting, Alexander [Verfasser:in]; Glässel, Peter [Verfasser:in]; Kim, Jiyoung [Verfasser:in]; Klewin, Sebastian [Verfasser:in]; Leardini, Lucia [Verfasser:in]; Mercado Pérez, Jorge [Verfasser:in]; Oeschler, Helmut [Verfasser:in]; Ohlson, Alice [Verfasser:in]; Pachmayer, Yvonne C. [Verfasser:in]; Reygers, Klaus [Verfasser:in]; Schicker, Rainer [Verfasser:in]; Schmidt, Marten Ole [Verfasser:in]; Stachel, Johanna [Verfasser:in]; Weiser, Dennis [Verfasser:in]; Wilkinson, Jeremy [Verfasser:in]; Windelband, Bernd [Verfasser:in]; Zimmermann, Alice [Verfasser:in]

Erschienen: 17 August 2017

Sprache: Englisch

DOI: 10.1140/epjc/s10052-017-5090-4

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Anmerkungen: ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch, A. Deisting, P. Glässel, J. Kim, S. Klewin, L. Leardini, J. Mercado Pérez, H. Oeschler, A. Ohlson, Y. Pachmayer, K. Reygers, R. Schicker, M.O. Schmidt, S. Schuchmann, J. Stachel, D.F. Weiser, J. Wilkinson, B. Windelband, A. Zimmermann [und weitere]

Beschreibung: The production cross sections for prompt charmed mesons D0D0\mathrm{D^0}, D+D+\mathrm{D^+}, D∗+D∗+\mathrm{D^{*+}} and D+sDs+\mathrm{D_s^+} were measured at mid-rapidity in proton-proton collisions at a centre-of-mass energy s√=7 TeVs=7 TeV\sqrt{s}=7~{\mathrm {TeV}} with the ALICE detector at the Large Hadron Collider (LHC). D mesons were reconstructed from their decays D0→K−π+D0→K−π+\mathrm{D}^0 \rightarrow \mathrm{K}^-\pi ^+, D+→K−π+π+D+→K−π+π+\mathrm{D}^+\rightarrow \mathrm{K}^-\pi ^+\pi ^+, D∗+→D0π+D∗+→D0π+\mathrm{D}^{*+} \rightarrow \mathrm{D}^0 \pi ^+, D+s→ϕπ+→K−K+π+Ds+→ϕπ+→K−K+π+\mathrm{D_s^{+}\rightarrow \phi \pi ^+\rightarrow K^-K^+\pi ^+}, and their charge conjugates.With respect to previous measurements in the same rapidity region, the coverage in transverse momentum (pTpTp_\mathrm{T}) is extended and the uncertainties are reduced by a factor of about two. The accuracy on the estimated total cc¯¯cc¯\mathrm{c}{\overline{\mathrm{c}}} production cross section is likewise improved. The measured pTpTp_\mathrm{T}-differential cross sections are compared with the results of three perturbative QCD calculations.

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