\rmΛ⁺_c production cross section in pp and p--Pb collisions down to p_{\rm T} = 0 at √s_{\rm NN} = 5.02 TeV measured with ALICE

2021/09/13 by Kalteyer, Annalena Sophie
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.2109.05949

Abstract

The open heavy-flavour hadron measurements in proton--proton and proton--lead collisions give insight into the charm production and hadronization mechanisms. In this contribution, the latest measurements of the production cross section of prompt Λ⁺_{\rm c} and its charge conjugate performed with the ALICE detector at midrapidity in pp, and the new measurement of Λ_c⁺ → p K_S⁰ performed down to p_{\rm T}=0 in p--Pb collisions at √s_{\rm NN} = 5.02 TeV are presented. We also present the first ALICE measurement of the baryon-to-meson ratio Λ⁺_{\rm c}/\rm D⁰ and the Λ⁺_{\rm c} nuclear modification factor R_{\rm pPb} down to p_{\rm T} = 0 in p--Pb collisions. The Λ⁺_{\rm c}/\rm D⁰ ratio at midrapidity at the LHC is significantly higher than the one in \rm e⁺e^- collisions, suggesting that the fragmentation of charm is not universal across different collision systems. The results are compared with theoretical calculations.

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