Nuclear modification factors of pion and light nuclei in a framework of thermal model
The particle yields and the nuclear modification factor ($R_{cp}$) for $\pi^\pm$, $p(\bar p)$, $d(\bar d)$, $t(\bar t)$ and $^3He(\bar{^3He})$ are studied in Au + Au collisions at $\sqrt{S_{NN}}$ = 200 GeV/c based on the blast-wave model and nucleonic coalescence model. The influences of resonance decay on $p(\bar p)$ and $\pi$ yields, $p/\pi$-ratio and nuclear modification factors have been discussed. An apparent number-of-constituent-quark scaling of $R_{cp}$ for $p(\bar p)$ and $\pi$ is presented. Similarly, the number-of-nucleon scaling of $R_{cp}$ for $p(\bar p)$, $d(\bar d)$, $t(\bar t)$ and $^3He(\bar{^3He})$ is also addressed.