# Quark Matter 2018

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!

## Multi-stage jet evolution and mass hierarchy of heavy quark energy loss in heavy-ion collisions

May 15, 2018, 4:40 PM
20m
Sala Mosaici-2, 3rd Floor (Palazzo del Casinò)

### Sala Mosaici-2, 3rd Floor

#### Palazzo del Casinò

Parallel Talk Open heavy flavour

### Speaker

Shanshan Cao (Wayne State University)

### Description

Heavy quarks serve as valuable probes of the QGP properties as well as the mass hierarchy of parton energy loss. Experimental data at the LHC indicate significant nuclear modification of heavy flavor ($D$ & $B$) meson production that is comparable to light flavor hadrons, which seem contradictory to one’s earlier expectation of $\Delta E_g > \Delta E_q > \Delta E_c > \Delta E_b$. We extended the Linear Boltzmann Transport (LBT) model coupled to hydrodynamic medium to heavy quark jet evolution in the QGP including both elastic and inelastic scattering processes [1,2]. Within the LBT model, we obtain good descriptions of heavy flavor meson suppression, elliptic and triangular flow coefficients observed at the LHC and RHIC.

The time-ordered transport model is further combined with a virtuality-ordered parton shower scheme into a multi-stage evolution approach [3,4] that includes a rare-scattering multiple emission formalism at momentum large compared to heavy quark mass (sensitive only to the transverse diffusion coefficient), and a single scattering induced emission formalism at momentum comparable to mass (sensitive to the transverse diffusion as well as longitudinal drag and diffusion coefficients). This multi-stage approach reduces the difference of energy loss between $c$ and $b$ quarks and simultaneously describes $D$ and $B$ meson $R_\mathrm{AA}$. In addition, the mass (or velocity) dependence of jet-induced medium excitation is explored for the first time. Its effects on the mass hierarchy of parton energy loss and heavy-light hadron correlation functions are investigated.

[1] S. Cao, T. Luo, G.-Y. Qin, and X.-N. Wang, Phys. Rev. C94 (2016) 1, 014909.
[2] S. Cao, T. Luo, G.-Y. Qin, and X.-N. Wang, arXiv:1703.00822.
[3] S. Cao, A. Majumder, G.-Y. Qin, and C. Shen, arXiv:1711.09053.
[4] S. Cao, et al., Phys. Rev. C96 (2017) 2, 024909.

Centralised submission by Collaboration Presenter name already specified Theory

### Primary author

Shanshan Cao (Wayne State University)

### Co-authors

Abhijit Majumder (Wayne state university) Guang-You Qin (Central China Normal University) Xin-Nian Wang (Lawrence Berkeley National Lab. (US))

### Presentation materials

 Shanshan - QM 2018.pdf Shanshan - QM 2018.pptx