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

Abstract

We report the first measurement of ${\Lambda }_c^{+}$ (average of ${\Lambda }_c^{+}$ and ${\bar{\Lambda }}_c^{-}$) 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 $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV from the STAR experiment. The transverse momentum spectra of ${\Lambda }_c^{+}$ 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 ${\Lambda }_c^{+}/D^0$ 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 ${\Lambda }_c^{+}/D^0$ 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.

References in corpus (5)

• Glauber Modeling in High Energy Nuclear Collisions
• Observation of $D^0$ meson nuclear modifications in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 200 GeV
• ${\mathbf{D}}_{\mathbf{s}}$-Meson as Quantitative Probe of Diffusion and Hadronization in Nuclear Collisions
• Combined analysis of charm-quark fragmentation-fraction measurements
• Diffusion of ${\Lambda }_c$ in hot hadronic medium and its impact on ${\Lambda }_c/D$ ratio

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• An experimental review of open heavy flavor and quarkonium production at RHIC
• Charmed hadron chemistry in relativistic heavy-ion collisions
• Doubly charmed baryon production in heavy ion collisions
• Charmed hadron production in an improved quark coalescence model
• Development of heavy-flavour flow-harmonics in high-energy nuclear collisions
• In-medium properties of pseudoscalar $D_s$ and $B_s$ mesons
• Event-shape engineering and heavy-flavour observables in relativistic heavy-ion collisions
• Femtoscopic correlations and the ${\Lambda }_{c}N$ interaction
• Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV at RHIC
• Hydrodynamic description of $D$ meson production in high-energy heavy-ion collisions
• Charmed hadron production via equal-velocity quark combination in ultra-relativistic heavy ion collisions
• Charm-hadron production in $pp$ and AA collisions
• Study of Heavy Hadron Production in Au + Au Collisions at a Center-of-Mass Energy of $\sqrt{s_{NN}}=200$ GeV
• Production of Strange and Charm Hadrons in Pb+Pb Collisions at $\sqrt{s_{NN}}=$ 5.02 TeV
• Recent Heavy-Flavor Results from STAR