Measurement of the Λc+ to D ⁰ production ratio in periphera PbPb collisions at √sNN = 5.02 TeV

Abstract

Abstract We report on a measurement of the $$ {\Lambda}_c^{+} $$ Λ c +

to D0 production ratio in peripheral PbPb collisions at $$ \sqrt{s_{\textrm{NN}}} $$

s NN

= 5.02 TeV with the LHCb detector in the forward rapidity region 2 < y < 4.5. The $$ {\Lambda}_c^{+} $$

Λ c +

(D0) hadrons are reconstructed via the decay channel $$ {\Lambda}_c^{+} $$

Λ c +

→ pK−π+ (D0→ K−π+) for 2 < pT< 8 GeV/c and in the centrality range of about 65–90%. The results show no significant dependence on pT, 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 $$ \sqrt{s_{\textrm{NN}}} $$

s NN

= 5.02 TeV. The data agree well with predictions from PYTHIA in pp collisions at $$ \sqrt{s} $$

s

= 5 TeV but are in tension with predictions of the Statistical Hadronization model.