Speaker
Mr
Zhilei She
(China University of Geosciences(Wuhan))
Description
The nuclear modification factors ($R_{AA}$) of $\pi^{\pm}, p(\bar p)$, and $d(\bar d)$ with $|y|<0.5, p<6.0$ GeV/c in peripheral (40-60%) and central (0-10%) lead-lead collisions at $\sqrt {s_{NN}}$ =2.76 TeV have been studied using the parton and hadron cascade ( PACIAE) model plus the dynamically constrained phase-space coalescence ( DCPC ) model. It is found that the distribution of $R_{AA}$ of light (anti-)nuclei $d$ is similar to that of hadrons ($\pi, p$), and the distribution of anti-particles is the same as that of particles.
The suppression of high transverse momentum particles strongly depends on event centrality and mass of the particles, $i.e$, the central collision is more suppressed than the peripheral collision.
Besides, the yield ratios, double ratios $R^D_{AA}$ of ($\bar d$ to $\bar p$, $\bar p$ to $\pi^-$, $d$ to $p$, $p$ to $\pi^+$),
and the coalescence parameter $B_2$ for ($d, \bar d$) in pp, central and peripheral $Pb-Pb$ collisions are discussed, respectively.
It is observed that the yield ratios and $R^D_{AA}$ of $\bar d$ to $\bar p$ and $\bar p$ to $\pi^-$
are also the same with the corresponding values of $d$ to $p$ and $p$ to $\pi^+$
in three different collision systems, respectively, suggesting that the suppressions
of matter ($\pi^{+}, p, d$) and the corresponding
antimatter ($\pi^{-},\bar{p},\bar{d}$) has the same character and performance. Our results are comparable to those of experimental data at $p_{T}<3.0$ GeV/c.
| Abstract Type | Poster |
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Primary author
Mr
Zhilei She
(China University of Geosciences(Wuhan))
Co-author
Prof.
Gang Chen
(China University of Geosciences(Wuhan))
