Observation of a multiplicity dependence in the pT-differential charm baryon-to-meson ratios in proton-proton collisions at √s=13 TeV ALICE collaboration* 

Erscheinungsform: Aufsatz
Beteiligte:
  • Acharya, Shreyasi
  • Angelov, Venelin
  • Berdnikova, Anastasia
  • Bergmann, Luisa
  • Danisch, Meike
  • Feuillard, Victor
  • Glässel, Peter
  • Kim, Jiyoung
  • Kim, Minjung
  • Kroesen, Martin
  • López, Jorge
  • Martin, Nicole Alice
  • Nath, Abhishek
  • Pachmayer, Yvonne C.
  • Reygers, Klaus
  • Schicker, Rainer
  • Schmah, Alexander
  • Schmidt, Marten Ole
  • Skorodumovs, Georgijs
  • Stachel, Johanna
  • Stiefelmaier, Stephan
  • Völkel, Benedikt
  • Völkl, Martin
  • Windelband, Bernd
  • Yüncü, Alperen
Körperschaft: ALICE
Umfang: 15
Nebentitel: sqrt
Anmerkungen: Im Titel ist "T" ist tiefgestellt, der Buchstabe "s" steht unter dem Wurzelsymbol
Gesehen am 25.08.2022
ALICE collaboration*: S. Acharya, V. Anguelov, A. Berdnikova, L. Bergmann, M.C. Danisch, V.J.G. Feuillard, P. Glässel, J. Kim, M. Kim, M. Kroesen, J.A. Lopez, N.A. Martin, A. Nath, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, G. Skorodumovs, J. Stachel, S.F. Stiefelmaier, B. Volkel, M.A. Völkl, B. Windelband, A. Yuncu [und 994 weitere]
Identifikatoren/​Sonstige Nummern: 1815186046 [PPN]
In: Amsterdam : North-Holland Publ., 1967 829(2022), Artikel-ID 137065, Seite 1-15 volume:829 year:2022 elocationid:137065 pages:1-15 extent:15
Inhalt:
  • The production of prompt D0, Ds+, and Λc+ hadrons, and their ratios, Ds+/D0 and Λc+/D0, are measured in proton-proton collisions at s=13 TeV at midrapidity (|y|<0.5) with the ALICE detector at the LHC. The measurements are performed as a function of the charm-hadron transverse momentum (pT) in intervals of charged-particle multiplicity, measured with two multiplicity estimators covering different pseudorapidity regions. While the strange to non-strange Ds+/D0 ratio indicates no significant multiplicity dependence, the baryon-to-meson pT-differential Λc+/D0 ratio shows a multiplicity-dependent enhancement, with a significance of 5.3σ for 1<pT<12 GeV/c, comparing the highest multiplicity interval with respect to the lowest one. The measurements are compared with a theoretical model that explains the multiplicity dependence by a canonical treatment of quantum charges in the statistical hadronisation approach, and with predictions from event generators that implement colour reconnection mechanisms beyond the leading colour approximation to model the hadronisation process. The Λc+/D0 ratios as a function of pT present a similar shape and magnitude as the Λ/KS0 ratios in comparable multiplicity intervals, suggesting a potential common mechanism for light- and charm-hadron formation, with analogous multiplicity dependence. The pT-integrated ratios, extrapolated down to pT=0, do not show a significant dependence on multiplicity within the uncertainties.
URL: https://doi.org/10.1016/j.physletb.2022.137065
Weiter im Partnersystem: https://swb.bsz-bw.de/DB=2.1/PPNSET?PPN=1815186046
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