20-010 Charmed hadron production in an improved quark coalescence model
최종 수정일: 2020년 5월 14일
Sungtae Cho, Kai-Jia Sun, Che Ming Ko, Su Houng Lee, Yongseok Oh
Physical Review C 101, 024909 (2020)
We study the production of charmed hadrons D^0 and Λ_c^+ in relativistic heavy ion collisions using the charm quark coalescence. Besides taking into consideration changing hadron sizes in a hot dense medium, which results in an enhanced coalescence probability for charm quarks of very low transverse momenta, we also include the collective flow effect on heavier resonances, which leads to a shift of massive charmed resonances to larger transverse momenta. Including the conversion of charm quarks not undergoing coalescence to hadrons by independent fragmentation, we obtain a good description of the measured yield ratio Λ_c^+/D^0 as a function of transverse momentum in Au + Au collisions at √sNN = 200 GeV by the STAR Collaboration at the Relativistic Heavy Ion Collider.