First measurement of ${\mathrm{\Omega }}_{\mathrm{c}}^0$ production in pp collisions at $\sqrt{s}=13$ TeV with ALICE

Abstract

Recent measurements of charm-baryon production in proton--proton (pp) collisions at midrapidity by the ALICE collaboration showed that baryon-to-meson yield ratios are significantly higher than those measured in ${\mathrm{e}}^{+}{\mathrm{e}}^{-}$ collisions. The charm baryon-to-meson and charm baryon-to-baryon yield ratios provide unique information on hadronization mechanisms since the contributions from parton distribution function and parton--parton scattering terms cancel in the ratios. In this contribution, the first measurement of ${\mathrm{\Omega }}_{\mathrm{c}}^0$ production via the hadronic decay channel ${\mathrm{\Omega }}_{\mathrm{c}}^0\to {\mathrm{\Omega }}^{-}{\pi }^{+}$ (and its charge conjugate) in $2<p_{\mathrm{T}}<12$ GeV/$c$ performed with the ALICE detector at midrapidity in pp collisions at $\sqrt{s}=$ 13 TeV is presented. The ${\mathrm{\Omega }}_{\mathrm{c}}^0/{\mathrm{D}}^0$ and ${\mathrm{\Omega }}_{\mathrm{c}}^0/{\mathrm{\Xi }}_{\mathrm{c}}^0$ ratios multiplied by the decay branching ratio $\mathrm{BR}({\mathrm{\Omega }}_{\mathrm{c}}^0\to {\mathrm{\Omega }}^{-}{\pi }^{+})$, which is not experimentally measured, are compared to MC generators with fragmentation fractions based on ${\mathrm{e}}^{+}{\mathrm{e}}^{-}$ measurements and models including hadronization of charm quark via coalescence.

Proceedings of the 9th Annual Large Hadron Collider Physics (LHCP2021) conference, 7 - 12 June, 2021. 5 pages, 2 figures

References in corpus (4)

• Charm-Baryon Production in Proton-Proton Collisions
• ${\mathrm{\Lambda }}_{\mathrm{c}}^{+}$ production and baryon-to-meson ratios in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV at the LHC
• Measurement of the production cross section of prompt ${\Xi }_{\mathrm{c}}^0$ baryons at midrapidity in pp collisions at $\sqrt{s}$ = 5.02 TeV
• Charm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC