A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Λc+ Production and Baryon-to-Meson Ratios in pp and p-Pb Collisions at √sNN = 5.02 TeV at the LHC (2021)
ALICE Collaboration. (2021). Λc+ Production and Baryon-to-Meson Ratios in pp and p-Pb Collisions at √sNN = 5.02 TeV at the LHC. Physical Review Letters, 127(20), Article 054905. https://doi.org/10.1103/PhysRevLett.127.202301
JYU-tekijät tai -toimittajat
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Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: ALICE Collaboration
Lehti tai sarja: Physical Review Letters
ISSN: 0031-9007
eISSN: 1079-7114
Julkaisuvuosi: 2021
Volyymi: 127
Lehden numero: 20
Artikkelinumero: 054905
Kustantaja: American Physical Society
Julkaisumaa: Yhdysvallat (USA)
Julkaisun kieli: englanti
DOI: https://doi.org/10.1103/PhysRevLett.127.202301
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/79191
Julkaisu on rinnakkaistallennettu: https://arxiv.org/abs/2011.06078
Tiivistelmä
The prompt production of the charm baryon Λ+c and the Λ+c/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at √sNN = 5.02 TeV. These new measurements show a clear decrease of the Λ+c/D0 ratio with increasing transverse momentum (pT) in both collision systems in the range 2<12 GeV/c, exhibiting similarities with the light-flavor baryon-to-meson ratios p/π and Λ/K0S. At low pT, 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 charm-quark 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.
YSO-asiasanat: hiukkasfysiikka
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2021
JUFO-taso: 3
