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

0583909 - ÚJF 2024 RIV US eng J - Journal Article
Acharya, S. - Adamová, Dagmar - Aglieri Rinella, G. - Agnello, M. - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Filová, V. - Grecká, Ekaterina - Grund, D. - Haidlová, S. - Herman, T. - Isakov, Artem - Khuntia, A. - Kotliarov, Artem - Krupová, D. M. - Křížek, Filip - Kushpil, Svetlana - Šafařík, K. - Torres, S. R. - Závada, Petr … Total 1035 authors
Charm production and fragmentation fractions at midrapidity in pp collisions at √s=13 TeV.
Journal of High Energy Physics. Roč. 12, DEC (2023), č. článku 086. ISSN 1029-8479. E-ISSN 1029-8479
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE collaboration * heavy ion collisions * hadron-hadron scattering
OECD category: Nuclear physics; Particles and field physics (FZU-D)
Impact factor: 5.4, year: 2022
Method of publishing: Open access
https://doi.org/10.1007/JHEP12(2023)086

Measurements of the production cross sections of prompt D-0, D+, D*(+), D-s(+), Lambda(+)(c), and Xi(+)(c) charm hadrons at midrapidity in proton-proton collisions at root s = 13 TeV with the ALICE detector are presented. The D-meson cross sections as a function of transverse momentum (p(T)) are provided with improved precision and granularity. The ratios of p(T)-differential meson production cross sections based on this publication and on measurements at different 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 Lambda(+)(c) (Xi(+)(c)) baryon production extend the measured p(T) intervals down to p(T) = 0(3) GeV/c. These measurements are used to determine the charm-quark fragmentation fractions and the c (c) over bar production cross section at midrapidity (|y| < 0.5) based on the sum of the cross sections of the weakly-decaying ground-state charm hadrons D-0, D+, D-s(+), Lambda(+)(c), Xi(0)(c) and, for the first time, Xi(+)(c), and of the strongly-decaying J/psi mesons. The first measurements of Xi(+)(c) and Sigma(0,++)(c) fragmentation fractions at midrapidity are also reported. A significantly larger fraction of charm quarks hadronising to baryons is found compared to e(+)e(-) and ep collisions. The c (c) over bar production cross section at midrapidity is found to be at the upper bound of state-of-the-art perturbative QCD calculations.
Permanent Link: https://hdl.handle.net/11104/0351888