The production of prompt A+c baryons at midrapidity (|y| < 0.5) was measured in central (0-10%) and mid-central (30-50%) Pb-Pb collisions at the center-of-mass energy per nucleon-nucleon pair root sNN = 5.02 TeV with the ALICE detector. The results are more precise, more differential in centrality, and reach much lower transverse momentum (pT =1 GeV/c) with respect to previous measurements performed by the ALICE, STAR, and CMS Collaborations in nucleus-nucleus collisions, allowing for an extrapolation down to pT = 0. The pT-differential A+c /D0 ratio is enhanced with respect to the pp measurement for 4 < pT < 8 GeV/c by 3.7 standard deviations (cr), while the pT-integrated ratios are compatible within 1cr. The observed trend is similar to that observed in the strange sector for the A/K0S ratio. Model calculations including coalescence or statistical hadronization for charm-hadron formation are compared with the data.

Constraining hadronization mechanisms with Λ+c/D0 production ratios in Pb-Pb collisions at √SNN=5.02 TeV

Alocco, G.;Boi, S.;De Falco, A.;Fionda, F. M.;Mulliri, A.;Usai, G. L.;
2023-01-01

Abstract

The production of prompt A+c baryons at midrapidity (|y| < 0.5) was measured in central (0-10%) and mid-central (30-50%) Pb-Pb collisions at the center-of-mass energy per nucleon-nucleon pair root sNN = 5.02 TeV with the ALICE detector. The results are more precise, more differential in centrality, and reach much lower transverse momentum (pT =1 GeV/c) with respect to previous measurements performed by the ALICE, STAR, and CMS Collaborations in nucleus-nucleus collisions, allowing for an extrapolation down to pT = 0. The pT-differential A+c /D0 ratio is enhanced with respect to the pp measurement for 4 < pT < 8 GeV/c by 3.7 standard deviations (cr), while the pT-integrated ratios are compatible within 1cr. The observed trend is similar to that observed in the strange sector for the A/K0S ratio. Model calculations including coalescence or statistical hadronization for charm-hadron formation are compared with the data.
2023
PROTON-PROTON; INCLUSIVE PRODUCTION; E+E-ANNIHILATION; PP COLLISIONS; D+
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/384124
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