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

Summary, in English

The measurements of the production of prompt D , D + , D ∗ + , and Ds+ mesons in proton–proton (pp) collisions at s=5.02TeV 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 D → K - π + , D + → K - π + π + , D ∗ + → D π + → K - π + π + , Ds+→ϕπ+→K+K-π+, and their charge conjugates. The production cross sections were measured in the transverse momentum interval 0<pT<36GeV/c for D , 1<pT<36GeV/c for D + and D ∗ + , and in 2<pT<24GeV/c for Ds+ mesons. Thanks to the higher integrated luminosity, an analysis in finer p T bins with respect to the previous measurements at s=7TeV was performed, allowing for a more detailed description of the cross-section p T shape. The measured p T -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=5.02TeV. 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. © 2019, CERN for the benefit of the ALICE collaboration.

• Author: S Acharya; Jonatan Adolfsson; Peter Christiansen; Martin Ljunggren; Adrian Nassirpour; Anders Oskarsson; Tuva Richert; Omar Vazquez Rueda; David Silvermyr; Evert Stenlund; N Zurlo
• Department/s: Particle and nuclear physics; eSSENCE: The e-Science Collaboration
• Publishing year: 2019
• Language: English
• Publication/Series: European Physical Journal C
• Volume: 79
• Issue: 5
• Links: http://dx.doi.org/10.1140/epjc/s10052-019-6873-6
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1434-6044