Charm fragmentation fractions and [Formula omitted] cross section in p-Pb collisions at [Formula omitted]

The total charm-quark production cross section per unit of rapidity [Formula omitted], and the fragmentation fractions of charm quarks to different charm-hadron species [Formula omitted], are measured for the first time in p-Pb collisions at [Formula omitted] at midrapidity ( [Formula omitted] in th...

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Veröffentlicht in:The European physical journal. C, Particles and fields Jg. 84; H. 12
Hauptverfasser: Acharya, S, Adamová, D, Agarwal, A, Aglieri Rinella, G, Aglietta, L, Agnello, M, Agrawal, N
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Springer 01.12.2024
Schlagworte:
Collisions (Nuclear physics)
Distribution (Probability theory)
Quarks
ISSN:1434-6044
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Zusammenfassung:The total charm-quark production cross section per unit of rapidity [Formula omitted], and the fragmentation fractions of charm quarks to different charm-hadron species [Formula omitted], are measured for the first time in p-Pb collisions at [Formula omitted] at midrapidity ( [Formula omitted] in the centre-of-mass frame) using data collected by ALICE at the CERN LHC. The results are obtained based on all the available measurements of prompt production of ground-state charm-hadron species: [Formula omitted], [Formula omitted], [Formula omitted], and [Formula omitted] mesons, and [Formula omitted] and [Formula omitted] baryons. The resulting cross section is [Formula omitted], which is consistent with a binary scaling of pQCD calculations from pp collisions. The measured fragmentation fractions are compatible with those measured in pp collisions at [Formula omitted] and 13 TeV, showing an increase in the relative production rates of charm baryons with respect to charm mesons in pp and p-Pb collisions compared with [Formula omitted] and [Formula omitted] collisions. The [Formula omitted]-integrated nuclear modification factor of charm quarks, [Formula omitted], is found to be consistent with unity and with theoretical predictions including nuclear modifications of the parton distribution functions.
ISSN:1434-6044
DOI:10.1140/epjc/s10052-024-13394-1