Quark Matter 2025

Measurement of heavy-flavor electron production in Au+Au collisions at sNN = 54.4 GeV at STAR

Not scheduled

20m

Goethe University Frankfurt, Campus Westend, Theodor-W.-Adorno-Platz 1, 60629 Frankfurt am Main, Germany

Poster Heavy flavor & quarkonia Poster session 2

Speaker

Mrs Veronika Prozorova (Czech Technical University in Prague)

Description

Studying heavy-flavor quarks can enhance our understanding of parton interactions with the Quark-Gluon Plasma (QGP). Due to their significant mass, heavy quarks (charm and bottom) are primarily produced during the early stages of high-energy heavy-ion collisions, where hard scatterings dominate, allowing them to experience the entire evolution of the QGP. One approach to investigate heavy-quark transport properties in QGP is through the measurement of heavy-flavor electrons (HFE), which are electrons emitted from the semi-leptonic decays of heavy-flavor hadrons.

In this contribution, we present measurements of HFE yield and central-to-peripheral nuclear modification factor as functions of transverse momentum ($p_{\mathrm{T}}$) in Au+Au collisions at $\sqrt{s_{NN}}=54.4$ GeV by the STAR experiment - making this the first such result at this energy. Strong HFE suppression has been observed in central Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV. This measurement at energies below the RHIC top energy provides new insights into the heavy-quark transport coefficient dependence on QGP temperature and collision system baryon chemical potential, and complements existing results at $\sqrt{s_{NN}}=200$ GeV and the recent HFE elliptic flow measurements at $\sqrt{s_{NN}}=54.4$ GeV. The obtained results will also be compared with available model predictions.

Presentation materials

PosterQM25_Prozorova.pdf