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 a strange quark.
However, the models cannot provide an accurate description for the $\Xi_\mathrm{c}^{0,+}$ and $\Omega_\mathrm{c}^{0}$ measurements, which contain both charm and strange quarks, even though the models which include hadronization via both coalescence and fragmentation show the similar trends in baryon-to-meson production yield ratios obtained from the data.
Therefore, further investigation are needed to unveil the hadronization of charm quarks.
The ALICE Collaboration also measured the $\Lambda_\mathrm{c}^{+}$ baryons as a function of charged particles multiplicity in pp collisions at $\sqrt{s}$ = 13 TeV. In this measurement, the production yield ratios between $\Lambda_\mathrm{c}^{+}$ and $\mathrm{D}^0$ show a remarkable dependence on multiplicity.
Similar measurements of $\Xi_\mathrm{c}^{0,+}$ as a function of the charged particles multiplicity are expected to provide additional constraints for modeling the hadronization mechanism of charm quarks.
In this poster, the measurement of $\Xi_\mathrm{c}^{+}$ for several charged particles multiplicity classes, reconstructed via the hadronic decay channel $\Xi_\mathrm{c}^{+} \rightarrow \Xi^{-} \pi^{+} \pi^{+}$ at midrapidity in pp collisions, will be shown. The results were obtained for pp collisions at $\sqrt{s}$ = 13 TeV, using minimum bias and high-multiplicity triggered data recorded by the ALICE detector.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | ALICE |
