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Sep 5 – 9, 2022
online
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f0(980) resonance elliptic flow and its constituent quark content

Sep 7, 2022, 3:50 PM
25m
online

online

FSU, Tallahassee, FL, USA
oral presentation Heavy Ions

Speaker

Dr Jie Zhao (Fudan University)

Description

Deconfined quarks and gluons are expected to be created in the relativistic heavy-ion collision. According to the coalescence model, yields of exotic hadrons are expected to be strongly affected by their structures [1]. Searching for exotic state particles and studying their properties can extend our understanding of quantum chromodynamics (QCD). The $f_{0}$(980) resonance is an exotic state decaying primarily into $\pi\pi$. Currently the structure and quark content of the $f_{0}$(980) is unknown with several predictions from theory being a $q\overline{q}$ state, a $qq\overline{q}\overline{q}$ state, a $K\overline{K}$ molecule state, or a gluonium state. We report the first $f_{0}$(980) elliptic flow ($v_{2}$) measurement from 200 GeV Au+Au collisions at STAR. The transverse momentum dependence of $v_{2}$ is examined and compared to those of other hadrons (baryons and mesons). The empirical number of constituent quark (NCQ) scaling is used to investigate the constituent quark content of $f_{0}$(980) [2], which may potentially address an important question in QCD. We will report our findings and discuss its implications.

[1] S. Cho, etal. (ExHIC Collaboration), Phys. Rev. Lett. 106, 212001 (2011)

[2] A. Gu, T. Edmonds, J. Zhao, F. Wang, Phys. Rev. C 101, 024908 (2020), arXiv:1902.07152

speaker affiliation Fudan University

Primary author

Dr Jie Zhao (Fudan University)

Presentation materials