Measurement of D0, D+, D*+ and D+s production in pp collisions at √s = 5.02 TeV with ALICE

ALICE Collaboration, S. Acharya, H. A. Andrews, D. Evans, Kay Graham, Oliver Jevons, Peter Jones, Anton Jusko, Marian Krivda, Jakub Kvapil, Roman Lietava, Orlando Villalobos Baillie, Emily Willsher, Nima Zardoshti

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Abstract

The measurements of the production of prompt D0 , D+ , D∗+ , and D+s mesons in proton–proton (pp) collisions at s√=5.02 TeV with the ALICE detector at the Large Hadron Collider (LHC) are reported. D mesons were reconstructed at mid-rapidity ( |y|<0.5 ) via their hadronic decay channels D0→K−π+ , D+→K−π+π+ , D∗+→D0π+→K−π+π+ , D+s→ϕπ+→K+K−π+ , and their charge conjugates. The production cross sections were measured in the transverse momentum interval 0<pT<36 GeV/c for D0 , 1<pT<36 GeV/c for D+ and D∗+ , and in 2<pT<24 GeV/c for D+s mesons. Thanks to the higher integrated luminosity, an analysis in finer pT bins with respect to the previous measurements at s√=7 TeV was performed, allowing for a more detailed description of the cross-section pT shape. The measured pT -differential production cross sections are compared to the results at s√=7 TeV and to four different perturbative QCD calculations. Its rapidity dependence is also tested combining the ALICE and LHCb measurements in pp collisions at s√=5.02 TeV . This measurement will allow for a more accurate determination of the nuclear modification factor in p–Pb and Pb–Pb collisions performed at the same nucleon–nucleon centre-of-mass energy.
Original languageEnglish
Article number388
JournalEur. Phys. J. C
Volume79
Issue number5
DOIs
Publication statusPublished - 6 May 2019

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