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!

Femtoscopic Measurements for Shape-engineered Events in Au+Au Collisions at STAR

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 Correlations and fluctuations Poster Session


Benjamin Schweid (Stony Brook University)


Femptoscopic measurements allow access to the spatio-temporal characteristics of the systems produced in relativistic heavy-ion collisions. This poster presents new measurements of the two-pion HBT radii $\mathrm{R_{out}}$, $\mathrm{R_{side}}$ and $\mathrm{R_{long}}$ have been made for shape-engineered events by the STAR experiment. Shape selection was accomplished via cuts on the distributions of the second-order flow vector $Q_2$ \cite{timmins}\cite{lacey}. Selected events, characterized with larger magnitudes of $Q_{2}$, indicate a systematic decrease for $R_{long}$ and $R_{out}$ with little, if any, change for $R_{side}$. Results obtained as a function of collision centrality and average pair transverse momentum ($k_T$) will be presented for the full range of the Au+Au beam energy scan ($\sqrt{s_{NN}} = 7.7 - 200$ GeV). The implications of these results for expansion dynamics of the collision systems will be discussed.

[1] J. Schukraft, A. Timmins, and S. A. Voloshin, Phys. Lett. B719, 394 (2013).
[2] Roy. A Lacey, et. al., J.Phys. G 43 (2016) no.10, 10LT01, arXiv:1311.1728.

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

Primary author

Zhenyu Ye (University of Illinois at Chicago)

Presentation materials

There are no materials yet.