May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Measurements of D0 Production in p+Au and d+Au Collisions at √sNN = 200 GeV by the STAR Experiment

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

First floor and third floor

Palazzo del Casinò

Poster Initial state physics and approach to equilibrium Poster Session


Lukas Kramarik (Czech Technical University (CZ))


Charm quarks possess large masses, and thus 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, such as the change in the parton distribution function between a free nucleon and a nucleus, 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 p+A and d+A collisions, where only the CNM effects are present. Furthermore, a sizable azimuthal anisotropy ($v_2$) has been observed in both nucleus-nucleus collisions and small-system collisions of high multiplicities. To better understand the origin of the flow-like signal in small-system collisions, it is important to study charm quark azimuthal anisotropy in these systems.

In this presentation, we will report on the first measurements of $\text{D}^{0}$ production in p+Au collisions, and the $\text{D}^{0}$ transverse momentum spectrum and $v_2$ with the Heavy Flavor Tracker in d+Au collisions, all at $\sqrt{s_{\text{NN}}}=200$ GeV. The nuclear modification factors of $\text{D}^{0}$ meson will be extracted to quantify the CNM effects, and a comparison will be made to those of electrons from open heavy flavor hadron decays in p+Au collisions. Different cuts on the pseudo-rapidity gap between $\text{D}^{0}$ candidates and tracks used for event plane reconstruction, as well as different techniques, such as event plane and two-particle correlation methods, will be explored to help understand different physics mechanisms contributing to the azimuthal anisotropy.

Collaboration STAR
Content type Experiment
Centralised submission by Collaboration Presenter name already specified

Primary author

Zhenyu Ye (University of Illinois at Chicago)

Presentation materials