Speakers
Description
A maximum is unexpectedly shown at intermediate p_T for the baryon-to-meson yield ratio of a function of transverse momentum p_T both in p+p similar to the case in A+A. It has been widely discussed. To understand such production mechanisms in small systems, ALCIE proposes using jet constraints to separate the particles produced in hard processes from those produced in the underlying event in the measurement of the production of Λ and K_S^0 in jets. It has been found and argued that the Λ/K_S^0 ratio within jets is lower than the one obtained in the inclusive measurements and does not show the characteristic enhancement of baryons at intermediate p_T . Charm quark is believed to be produced in the hard process, such investigation can be carried out by computing the inclusive Λ_C/D^0 ratio and the Λ_C/D^0 ratio within jets. We find an opposite trend when implementing the jet requirement: Λ_C/D^0 ratios within jets is even more enhanced than in the inclusive measurements when a color reconnection configuration: CR model 2 is used for hadronization description (which inclusive Λ_C/D^0 ratio can describe data for the enhancement of baryons at intermediate p_T).
We further extend the calculation to the Pb+Pb case, and we predict, Λ_C/D^0 ratios within jets is slightly lower than in the inclusive measurements, in such calculation, the SHELL model has been used to describe energy loss and the in-medium hadronization is described by a coalescence+ fragmentation hybrid approach.
| Category | Theory |
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