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Λ_{c}^{+} Production and Baryon-to-Meson Ratios in pp and p-Pb Collisions at √s_{NN}=5.02 TeV at the LHC

Acharya, S
•
Adamová, D
•
Adler, A
altro
Zurlo, N
2021
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
The prompt production of the charm baryon Lambda(c+) and the A(c)(+)/D-0 production ratios were measured at midrapidity with the ALICE detector in pp and (p)-Pb collisions at root S-NN = 5.02 TeV. These new measurements show a clear decrease of the Lambda(+)(c)/D-0 ratio with increasing transverse momentum (p(T)) in both collision systems in the range 2 < P-T < 12 GeV/c, exhibiting similarities with the light-flavor baryon-tomeson ratios p/pi and Lambda/K-S(0). At low p(T), predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charmquark fragmentation processes measured in e(+) e(-) and e(-) p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies.
DOI
10.1103/PhysRevLett.127.202301
WOS
WOS:000718362900002
Archivio
http://hdl.handle.net/11368/3028024
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85119185893
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/3028024/1/PRL_127(2021)202301_1-1.pdf.pdf
Soggetti
  • p-Pb interaction

  • heavy-flavor producti...

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