Speaker
Description
In-jet production is a useful tool to separate the contribution from the hard processes and the underlying events. In this letter, we find the in-jet requirement enhances the heavy flavor baryon-to-meson ratio more when a color re-connection mechanism (CR mode2) describes hadronization in p+p, which is opposite to the light flavor case. It indicates the hard process contribution alone will lead to an enhancement of the heavy flavor baryon-to-meson ratio using CR mode2 while the light flavor baryon-to-meson ratio enhancement is mainly coming from underlying events. When the hot and dense medium is involved in Pb+Pb collisions, the in-jet $\rm \Lambda_c^+/D^0$ ratio also enhances at intermediate $\rm p_T$ when a coalescence + fragmentation hybrid approach is used to describe in-medium hadronization. To distinguish the mechanism of two types of enhancement, $\rm \Lambda_c^+/D^0$ ratios as functions of particle-jet axis distances $\rm R$ for different jet $\rm p_T$ intervals are also been computed. The results indicate the enhancement described by the color re-connection mechanism is dominated by low $\rm p_T$ ($< 2$ GeV) enhancement and that described by a coalescence mechanism is dominated by intermediate $\rm p_T$ ($2-4$ GeV) enhancement. The detailed measurement of the in-jet $\rm \Lambda_c^+/D^0$ ratios in p+p collisions at lower $\rm p_T$ will help constrain the baryon hadronization mechanism in the small system.
