PoS - Proceedings of Science
Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - Hot and dense matter physics - QGP and heavy ion collisions
Measurements of $D^{\pm}$ meson production and total charm quark production yield at midrapidity in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200\,GeV by the STAR experiment
J. Vanek*  on behalf of the STAR collaboration
Full text: pdf
Pre-published on: March 02, 2022
Published on: May 24, 2022
Charm quarks are produced at very early stage of ultra-relativistic Au+Au collisions at RHIC top energy. This makes them an ideal probe of the Quark-Gluon Plasma, as they experience the whole evolution of the hot and dense medium. At STAR, production of charm quarks can be accessed via a direct topological reconstruction of hadronic decays of open charm hadrons, utilizing the excellent resolution of the Heavy Flavor Tracker. In these proceedings, we present measurements of D$^\pm$ meson production in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV. The invariant yields are extracted in 0-10$\%$, 10-40$\%$, and 40-80$\%$ central Au+Au collisions. The result is then used to calculate the nuclear modification factor, which reveals a strong suppression of high-$p_\mathrm{T}$ D$^\pm$ mesons in Au+Au collisions with respect to $p$+$p$ collisions. In addition, the D$^\pm$/D$^0$ yield ratio as a function of transverse momentum is calculated and compared to PYTHA 8 prediction. No significant modification of the ratio in Au+Au collisions is observed. The measurement of D$^\pm$ completed the measurements of the major ground states of open charm hadrons (D$^0$, D$^\pm$, D$_\mathrm{s}$, $\Lambda_\mathrm{c}$), that are used to calculate the total charm quark production cross section per binary nucleon-nucleon collision in 10-40$\%$ central Au+Au collisions. The measured value in Au+Au collisions is consistent with that measured in $p$+$p$ collisions.
DOI: https://doi.org/10.22323/1.380.0247
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.