Charm production and fragmentation fractions at midrapidity in pp collisions at √s=13 TeV

Scientific paper - Original scientific paper

• Author: S. Acharya
• Author: ...
• Author: Sven Gotovac
• Author: ...
• Author: David Karatović
• Author: ...
• Author: Petra Lončar
• Author: ...
• Author: Mirko Planinić
• Author: ...
• Author: Nikola Poljak
• Author: ...
• Author: Linda Vicković
• Author: ...
• Author: S. C. Zugravel
• Collaboration: ALICE Collaboration
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

Measurements of the production cross sections of prompt D0 , D+, D∗+, D+ s , Λ + c , and Ξ + c charm hadrons at midrapidity in proton-proton collisions at √ s = 13 TeV with the ALICE detector are presented. The D-meson cross sections as a function of transverse momentum (pT) are provided with improved precision and granularity. The ratios of pT-diferential meson production cross sections based on this publication and on measurements at diferent rapidity and collision energy provide a constraint... More on gluon parton distribution functions at low values of Bjorken-x (10−5–10−4 ). The measurements of Λ + c (Ξ + c ) baryon production extend the measured pT intervals down to pT = 0(3) GeV/c. These measurements are used to determine the charm-quark fragmentation fractions and the cc production cross section at midrapidity (|y| < 0.5) based on the sum of the cross sections of the weakly-decaying ground-state charm hadrons D0 , D+, D+ s , Λ + c , Ξ 0 c and, for the frst time, Ξ + c , and of the strongly-decaying J/ψ mesons. The frst measurements of Ξ + c and Σ 0,++ c fragmentation fractions at midrapidity are also reported. A signifcantly larger fraction of charm quarks hadronising to baryons is found compared to e +e − and ep collisions. The cc production cross section at midrapidity is found to be at the upper bound of state-of-the-art perturbative QCD calculations. Less

• Keywords (english): charm production
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Journal of High Energy Physics
• Numbering: vol. 2023, no. 12, 086
• e-ISSN: 1029-8479
• DOI: https://doi.org/10.1007/JHEP12(2023)086
• URN:NBN: urn:nbn:hr:217:966906
• Publication: 2023-12-13
• Document URL: https://link.springer.com/10.1007/JHEP12(2023)086
• Type of resource: Text
• Access conditions: Open access
• Public note: This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Received: September 8, 2023. Accepted: November 21, 2023. Published: December 13, 2023.
• Created on: 2024-07-13 19:42:24