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arXiv · 1704.04364

Measurements of $Λ_c^+$ and $D_s^+$ productions in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV from STAR

Long Zhou
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Abstract

We report the first measurement of $Λ_c^+$ (average of $Λ_c^+$ and $\barΛ_c^-$) baryon production and significantly improved measurement of $D_s^+$ (average of $D_s^+$ and $D_s^-$) meson production, within the rapidity range of $\left|y\right| < 1$ in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV from the STAR experiment. The transverse momentum spectra of $Λ_c^+$ and $D_s^+$ as well as their yield ratios to that of $D^0$ meson are also presented and compared to theoretical calculations.Both the $Λ_c^+/D^0$ and $D_s^+/D^0$ ratios are found to be significantly enhanced in Au+Au collisions with respect to those in p+p collisions predicted by PYTHIA. A model calculation including coalescence hadronization and thermalized charm quarks is consistent with the measured $Λ_c^+/D^0$ ratio. On the other hand, the TAMU model seems to underestimate the $D_s^+/D^0$ ratio measured in Au+Au collisions in the applicable kinematic region.

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Long Zhou. 2017-04-14. Measurements of $Λ_c^+$ and $D_s^+$ productions in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV from STAR. https://doi.org/10.1016/j.nuclphysa.2017.05.114

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