Speaker
Description
Recent measurements of the baryon-to-meson production yield ratios between charm baryons ($\Lambda_\mathrm{c}^{+}$, $\Sigma_\mathrm{c}^{0,++}$, $\Xi_\mathrm{c}^{0,+}$, $\Omega_\mathrm{c}^{0}$) and $\mathrm{D}$ mesons ($\mathrm{D}^0$) in small collision systems show a significant enhancement with respect to the measurements performed in $e^{+}e^{-}$ collisions. These results were compared with various models implementing a modified hadronization of charm quarks in hadronic collisions, which enhance the production of baryons.
The models can describe the measurements of $\Lambda_\mathrm{c}^{+}$ and $\Sigma_\mathrm{c}^{0,++}$, that don't contain the strange quark, but the description of $\Xi_\mathrm{c}^{0,+}$ and $\Omega_\mathrm{c}^{0}$ measurements, which contain both charm and strange quarks, is still challenging.
Therefore further investigation is needed to unveil the hadronization of $\Xi_\mathrm{c}^{0,+}$ and $\Omega_\mathrm{c}^{0}$.
The multiplicity dependence of $\Xi_\mathrm{c}^{+}$ production will be studied, reconstructing the $\Xi_\mathrm{c}^{+}$ via the hadronic decay channel $\Xi_\mathrm{c}^{+} \rightarrow \Xi^{-} \pi^{+} \pi^{+}$ at midrapidity in pp collisions at $\sqrt{s}$ = 13 TeV.
In this poster, the invariant-mass distributions of $\Xi_\mathrm{c}^{+}$ in different multiplicity bins using minimum bias and high multiplicity triggered data recorded by the ALICE detector will be shown.
The yield extraction procedure, using a machine learning model based on Boosted Decision Tree algorithms, will be briefly introduced as well.
Furthermore, the strategy for the measurement of the $\Xi_\mathrm{c}^{+}$ production cross section as a function of multiplicity will be discussed.
| Theory / experiment | Experiment |
|---|---|
| Group or collaboration name | ALICE |
