Szczegóły publikacji
Opis bibliograficzny
Charm production and fragmentation fractions at midrapidity in pp collisions at $\sqrt{s}$ = 13 TeV / S. Acharya, [et al.], B. BALIŚ, [et al.], M. GORGOŃ, [et al.], A. HORZYK, [et al.], M. JABŁOŃSKI, [et al.], J. P. KITOWSKI, [et al.], S. D. KORYCIAK, [et al.], T. M. LELEK, [et al.], R. W. MARCJAN, [et al.], P. G. RUSSEK, [et al.] // The Journal of High Energy Physics [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1029-8479. — 2023 — iss. 12 art. no. 86, s. [1], 1–56. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 42–48, Abstr. — Publikacja dostępna online od: 2023-12-13
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Dane bibliometryczne
| ID BaDAP | 151288 |
|---|---|
| Data dodania do BaDAP | 2024-01-20 |
| Tekst źródłowy | URL |
| DOI | 10.1007/JHEP12(2023)086 |
| Rok publikacji | 2023 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | The Journal of High Energy Physics |
Abstract
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 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, Ξ0c and, for the first time, Ξ+c, and of the strongly-decaying J/ψ mesons. The first measurements of Ξ+c and Σ0,++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.