Measurement of $\Omega^0_{\rm c}$ baryon production and branching-fraction ratio ${\rm BR(\Omega^0_c \rightarrow \Omega^- e^+\nu_e)} / {\rm BR(\Omega^0_c \rightarrow \Omega^- \pi^+)}$ in pp collisions at $\sqrt{s}$ = 13 TeV

TL;DR

This paper reports the first measurement of $ ext{Omega}_c^0$ baryon production and its semileptonic decay branching-fraction ratio in proton-proton collisions at 13 TeV, providing new experimental data for charm baryon behavior.

Contribution

The study presents the first measurement of $ ext{Omega}_c^0$ production and its decay branching-fraction ratio in pp collisions at 13 TeV, offering new insights into charm baryon decay properties.

Findings

Branching-fraction ratio measured as 1.12 ± 0.22 (stat.) ± 0.27 (syst.)

Differential cross section for $ ext{Omega}_c^0$ production provided in 2-12 GeV/c range

Comparison with theoretical models and previous measurements included.

Abstract

The inclusive production of the charm-strange baryon $\Omega^{0}_{\rm c}$ is measured for the first time via its semileptonic decay into $\Omega^{-}\rm e^{+}\nu_{e}$ at midrapidity ($|y|<0.8$) in proton$-$proton (pp) collisions at the centre-of-mass energy $\sqrt{s}=13$ TeV with the ALICE detector at the LHC. The transverse momentum ($p_{\rm T}$) differential cross section multiplied by the branching ratio is presented in the interval $2<p_{\rm T}<12~{\rm GeV}/c$. The branching-fraction ratio ${\rm BR}(\Omega^0_{\rm c} \rightarrow \Omega^{-}{\rm e}^{+}\nu_{\rm e})/ {\rm BR}(\Omega^0_{\rm c} \rightarrow \Omega^{-}{\pi}^{+})$ is measured to be 1.12 $\pm$ 0.22 (stat.) $\pm$ 0.27 (syst.). Comparisons with other experimental measurements, as well as with theoretical calculations, are presented.