Measurement of the Λ⁺_c to D⁰ production cross-section ratio in peripheral PbPb collisions at √s_NN = 5.02 TeV

We report on a measurement of the Λ⁺_c to D⁰ production ratio in peripheral PbPb collisions at √s_NN = 5.02 TeV with the LHCb detector in the forward rapidity region 2 < y < 4.5. The Λ⁺_c (D⁰) hadrons are reconstructed via the decay channel Λ⁺_c → pK⁻π⁺ (D⁰ → K⁻π⁺) for 2 < p_T < 8 GeV/c and in the centrality range of about 65–90%. The results show no significant dependence on p_T, y or the mean number of participating nucleons. They are also consistent with similar measurements obtained by the LHCb collaboration in pPb and Pbp collisions at √s_NN = 5.02 TeV. The data agree well with predictions from PYTHIA in pp collisions at √s = 5 TeV but are in tension with predictions of the Statistical Hadronization model.