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arXiv 0910.5908nucl-ex
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Au+Au碰撞中高$p_{T}$强子化学相对于p+p的修正

The Modification of high-$p_{T}$ hadro-chemistry in Au+Au collisions relative to p+p

Anthony R. Timmins

摘要:

我们提出了高横动量,$p_{T}$,π($π$),质子($p$),K介子($K$),和ρ($ρ$)光谱测量与STAR实验从p+p和Au+Au碰撞与\sNN{200}。我们发现在$p_{T} > 5$ GeV/c的Au+Au \sNN{200}碰撞中,相对于p+p \sNN{200}碰撞,$K/π$比得到增强.增强持续到$p_{T} \sim 12$ GeV/c的中心金+金200 GeV的碰撞。我们还表明,核修饰因子,$R_{AA}$,在相同的质心能量测量,并发现$R_{AA}(K)$和$R_{AA}(p)$要高于$R_{AA}(π)$在$p_T > 5$ GeV/c。介质引起的修改射流化学的影响进行了讨论。

英文摘要:

We present high transverse momentum, $p_{T}$, pion ($π$), proton ($p$), kaon ($K$), and rho ($ρ$) spectra measured with the STAR experiment from p+p and Au+Au collisions with \sNN{200}. We find the $K/π$ ratio to be enhanced in Au+Au \sNN{200} collisions relative to p+p \sNN{200} collisions at $p_{T} > 5$ GeV/c. The enhancement persists until $p_{T} \sim 12$ GeV/c for central Au+Au 200 GeV collisions. We also show the nuclear modification factor, $R_{AA}$, measured at the same center of mass energy, and find $R_{AA}(K)$ and $R_{AA}(p)$ to be higher than $R_{AA}(π)$ at $p_T > 5$ GeV/c. Implications for medium induced modifications of jet chemistry is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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