Speaker
Description
Measurements of the production of heavy-flavour hadrons in proton–proton (pp) collisions provide an important test of quantum chromodynamics (QCD).The heavy-flavour production cross section can be calculated using the factorisation approach as a convolution of three factors: the parton distribution functions, the partonic cross section, calculated with perturbative QCD calculations, and the fragmentation functions. Recent measurements of the baryon-to-meson (${\Lambda^+_{\rm{c}}/\rm{D}^0}$, ${{\Sigma^{0,++}_{\rm{c}}}/\rm{D}^0}$, ${\Xi^{0,+}_{\rm{c}}/\rm{D}^0}$ and ${\rm{BR\times\Omega^0_c/{D}^0}}$) ${p_{\rm{T}}}$-differential yield ratios in pp collisions are inconsistent with corresponding measurements in $\rm{e^+e^-}$ collision, indicating that the hadronisation of charm quarks is not a universal process among different collision systems. From measurements of the ${p_{\rm{T}}}$-differential ${\rm{\Lambda^+_c/D^0}}$ yield ratio as a function of the event multiplicity in pp collisions, the modificaion of the hadronisation mechanism is found to be multiplicity dependent. The measurement of the multiplicity dependence of the ${\rm{\Xi^0_c/\rm{D}^0}}$ yield ratio can provide further constraints on the study of charm hadronisation.
In this contribution, the production cross section of ${\rm{\Xi^0_c}}$ baryon reconstructed from the hadronic decay channel $\rm{\Xi_{c}^{0}}\rightarrow{\Xi^{-}\pi^{+}}$ and the baryon-to-meson yield ratio $\rm{\Xi^0_c/\rm{D}^0}$ as a function of charged-particle multiplicity in pp collisions at ${\sqrt{\textit s}}$ = 13 TeV at midrapidity with the ALICE detector at the LHC will be discussed.
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