Journalartikel
Autorenliste: Cao, Shanshan; Coci, Gabriele; Das, Santosh Kumar; Ke, Weiyao; Liu, Shuai Y. F.; Plumari, Salvatore; Song, Taesoo; Xu, Yingru; Aichelin, Jorg; Bass, Steffen; Bratkovskaya, Elena; Dong, Xin; Gossiaux, Pol Bernard; Greco, Vincenzo; He, Min; Nahrgane, Marlene; Rapp, Ralf; Scardina, Francesco; Wang, Xin-Nian
Jahr der Veröffentlichung: 2019
Zeitschrift: Physical Review C
Bandnummer: 99
Heftnummer: 5
ISSN: 2469-9985
eISSN: 2469-9993
Open Access Status: Green
DOI Link: https://doi.org/10.1103/PhysRevC.99.054907
Verlag: American Physical Society
Abstract:
Several transport models have been employed in recent years to analyze heavy-flavor meson spectra in high-energy heavy-ion collisions. Heavy-quark transport coefficients extracted from these models with their default parameters vary, however, by up to a factor of 5 at high momenta. To investigate the origin of this large theoretical uncertainty, a systematic comparison of heavy-quark transport coefficients is carried out between various transport models. Within a common scheme devised for the nuclear modification factor of charm quarks in a brick medium of a quark-gluon plasma, the systematic uncertainty of the extracted drag coefficient among these models is shown to be reduced to a factor of 2, which can be viewed as the smallest intrinsic systematical error band achievable at present time. This indicates the importance of a realistic hydrodynamic evolution constrained by bulk hadron spectra and of heavy-quark hadronization for understanding the final heavy-flavor hadron spectra and extracting heavy-quark drag coefficient. The transverse transport coefficient is less constrained due to the influence of the underlying mechanism for heavy-quark medium interaction. Additional constraints on transport models such as energy loss fluctuation and transverse-momentum broadening can further reduce theoretical uncertainties in the extracted transport coefficients.
Zitierstile
Harvard-Zitierstil: Cao, S., Coci, G., Das, S., Ke, W., Liu, S., Plumari, S., et al. (2019) Toward the determination of heavy-quark transport coefficients in quark-gluon plasma, Physical Review C, 99(5), Article 054907. https://doi.org/10.1103/PhysRevC.99.054907
APA-Zitierstil: Cao, S., Coci, G., Das, S., Ke, W., Liu, S., Plumari, S., Song, T., Xu, Y., Aichelin, J., Bass, S., Bratkovskaya, E., Dong, X., Gossiaux, P., Greco, V., He, M., Nahrgane, M., Rapp, R., Scardina, F., & Wang, X. (2019). Toward the determination of heavy-quark transport coefficients in quark-gluon plasma. Physical Review C. 99(5), Article 054907. https://doi.org/10.1103/PhysRevC.99.054907
Schlagwörter
COLLIDER; ELLIPTIC FLOW; MULTIPLE PARTON SCATTERING; PLUS PB COLLISIONS; RADIATIVE ENERGY-LOSS
