Constraining hadronization mechanisms with $\rm \Lambda_{\rm c}^{+}$/D$^0$ production ratios in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV

The ALICE collaboration
Phys.Lett.B 839 (2023) 137796, 2023.

Abstract (data abstract)
The production of prompt $\rm \Lambda_{\rm c}^{+}$ 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 $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ALICE detector. The $\rm \Lambda_{\rm c}^{+}$ production yield, the $\rm \Lambda_{\rm c}^{+} / D^0$ production ratio, and the $\rm \Lambda_{\rm c}^{+}$ nuclear modification factor $R_{\rm AA}$ are reported. The results are more precise and more differential in transverse momentum ($p_{\rm T}$) and centrality with respect to previous measurements. The $\rm \Lambda_{\rm c}^{+} / D^0$ ratio, which is enhanced with respect to the pp measurement for $4<p_{\rm T}<8$ GeV/$c$, is described by theoretical calculations that model the charm-quark transport in the quark--gluon plasma and include hadronization via both coalescence and fragmentation mechanisms.

  • Table 1a

    Data from Figure 1, left panel


    Transverse-momentum-differential production yields of prompt $\mathrm{\Lambda_c^+}$ in central (0--10\%) and mid-central (30--50\%) Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV.

  • Table 1b

    Data from Figure 1, right panel


    The $\mathrm{\Lambda_c^+ / D^0}$ production yield ratio in central (0--10\%) and mid-central (30--50\%) Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV.

  • Table 2

    Data from Figure 2


    The nuclear modification factor of prompt $\mathrm{\Lambda_c^+}$ as a function transverse momentum in central (0--10\%) and mid-central (30--50\%) Pb--Pb collisions...

Version 2 modifications: The only change w.r.t. the uploaded version is the removal of the "(%)" in the y axis for table 2.

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