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

Acharya, S.; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ...; Karatović, David; ...; Lončar, Petra; ...; Mudnić, Eugen; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Vicković, Linda; ...; Zurlo, N.

doi:10.1016/j.physletb.2022.137065

Pregled bibliografske jedinice broj: 1229286

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

(ALICE Collaboration) Acharya, S.; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ...; Karatović, David; ... et al.

Observation of a multiplicity dependence in the pT- differential charm baryon-to-meson ratios in proton- proton collisions at √s = 13 TeV // Physics Letters B, 829 (2022), 137065, 15 doi:10.1016/j.physletb.2022.137065 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 1229286 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

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

Autori
Acharya, S. ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Karatović, David ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
Physics Letters B (0370-2693) 829 (2022); 137065, 15

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
multiplicity: dependence ; p p: scattering ; hadronization: statistical ; charged particle: multiplicity ; hadronization: model ; rapidity: difference ; color ; ALICE ; transverse momentum ; CERN LHC Coll ; charm ; hadron ; Monte Carlo ; experimental results ; 13000 GeV-cms/nucleon

Sažetak
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/K0s 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA

Ustanove:
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Prirodoslovno-matematički fakultet, Zagreb

Profili:

David Karatović (autor)