Measurements of ${\Lambda_{\rm c}^+\rm /D^0}$ ratio as a function of multiplicity at midrapidity at $ \sqrt{s_{\text{NN}}} = 5.02\; \text{TeV}$

Abstract

In this contribution, the measurement of prompt ${\Lambda_{\rm c}^+\rm /D^0}$ ratio as a function of multiplicity in p--Pb collisions at mid-rapidity at $ \sqrt{s_{\text{NN}}} = 5.02 \;\text{TeV}$ is discussed. By performing this measurement as a function of multiplicity in pp and p--Pb collisions, we can evaluate the $p_{\rm T}$-differential baryon to meson enhancement and compare them to results in $ \rm e^-e^+$ and $ \rm e^-p$ collisions, where lower ${\Lambda_{\rm c}^+\rm /D^0}$ ratios at low and intermediate $p_{\rm T}$ have been observed, with the origin of this different behavior being still debated. In these measurements, we aim to compare the p--Pb results to pp collisions to investigate the possible effects of cold nuclear matter on charm-baryon production, and to Pb--Pb collisions for investigating the impact of quark--gluon plasma on charm quark hadronization.