Observation of D_s^{\pm}/D^0 enhancement in Au+Au collisions at sqrt{s_NN} = 
200 GeV

STAR Collaboration,; Adam, J.; Schmitz, N.; Seyboth, P.; et al.,

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Observation of D_s^{\pm}/D^0 enhancement in Au+Au collisions at sqrt{s_NN} = 200 GeV

STAR Collaboration, Adam, J., Schmitz, N., Seyboth, P., & et al. (2021). Observation of D_s^{\pm}/D^0 enhancement in Au+Au collisions at sqrt{s_NN} = 200 GeV. Physical Review Letters, 127, 092301. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2021-255.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-000A-1BCA-5 Versions-Permalink: https://hdl.handle.net/21.11116/0000-000A-1BCB-4

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Urheber:
STAR Collaboration¹, Autor
Adam, J.¹, Autor
Schmitz, N.¹, Autor
Seyboth, P.¹, Autor
et al.¹, Autor

Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650

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Schlagwörter: STAR

Zusammenfassung: We report on the first measurement of charm-strange meson D_s^{\pm} production at midrapidity in Au+Au collisions at sqrt{s_{rm NN}}} = 200 GeV from the STAR experiment. The yield ratio between strange (D_{s}^{\pm}) and non-strange (D^{0}) open-charm mesons is presented and compared to model calculations. A significant enhancement, relative to a PYTHIA simulation of p+p collisions, is observed in the D_{s}^{\pm}/D^0 yield ratio in Au+Au collisions over a large range of collision centralities. Model calculations incorporating abundant strange-quark production in the quark-gluon plasma (QGP) and coalescence hadronization qualitatively reproduce the data. The transverse-momentum integrated yield ratio of D_{s}^{\pm}/D^0 at midrapidity is consistent with a prediction from a statistical hadronization model with the parameters constrained by the yields of light and strange hadrons measured at the same collision energy. These results suggest that the coalescence of charm quarks with strange quarks in the QGP plays an important role in D_{s}^{\pm} meson production in heavy-ion collisions.