Measurement of $\text{D}^{0}$ production in d+Au collisions at $\sqrt{s_{\text{NN}}}=200$ GeV by the STAR experiment

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Small systems Poster Session

Speaker

Lukas Kramarik (Czech Technical University (CZ))

Description

Owing to their large mass, charm quarks are predominantly produced through initial hard scatterings in heavy-ion collisions. Therefore, they can serve as penetrating probes to study the intrinsic properties of the hot medium created in heavy-ion collisions. However, Cold Nuclear Matter (CNM) effects can also affect the charm quark production in nuclear collisions with respect to p+p collisions. These effects can be measured in small systems such as d+Au collisions.

In this poster, we will report the first measurement of $\text{D}^{0}$ production in d+Au collisions at $\sqrt{s_{\text{NN}}}=200$ GeV by the STAR experiment taking advantage of its high-precision Heavy Flavor Tracker detector. $\text{D}^{0}$ ($\overline{\text{D}^{0}}$) mesons were topologically reconstructed from their hadronic decay channel $\text{D}^{0} (\overline{\text{D}^{0}})\rightarrow K^- \pi^+ (K^+ \pi^-)$. In order to further improve the signal significance, a supervised machine learning algorithm (Boosted Decision Trees) was used. The nuclear modification factor of the $\text{D}^{0}$ meson was extracted to quantify the CNM effects and compared to model calculations.

Primary author

Lukas Kramarik (Czech Technical University (CZ))

Presentation Materials