A(c) Production in Au plus Au Collisions at root S-NN=200 GeV measured by the STAR experiment

作者：Xie, Guannan^*

来源：Nuclear Physics A, 2017, 967: 928-931.

DOI：10.1016/j.nuclphysa.2017.06.004

• Quark-Gluon Plasma
• Heavy Flavor Tracker
• A(c)
• Baryon to Meson Ratio
• Coalescence

At RHIC, enhancements in the baryon-to-meson ratio for light hadrons and hadrons containing strange quarks have been observed in central heavy-ion collisions compared to those in p+p and peripheral heavy-ion collisions in the intermediate transverse momentum (p(T)) range (2 < p(T) < 6 GeV/c). This can be explained by the hadronization mechanism involving multi-parton coalescence. A(c) is the lightest charmed baryon with mass close to that of the D-0 meson, and has shorter life time than D-0 (c tau similar to 60 mu m). Different models predict different magnitudes of enhancement in the A(c)/D-0 ratio depending on the degree to which charm quarks are thermalized in the medium and how the coalescence mechanism is implemented.
In these proceedings, we report the first measurement of Ac production in heavy-ion collisions using the Heavy Flavor Tracker at STAR. The invariant yield of Ac for 3 < p(T) < 6 GeV/c is measured in 10-60% central Au+Au collisions at root S-NN = 200 GeV.

• 出版日期2017-11
• 单位中国科学技术大学