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Can Tsallis Distribution Fit All the Particle Spectra Produced at RHIC and LHC?

机译:Tsallis分布是否可以拟合RHIC和LHC产生的所有粒子光谱?

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The Tsallis distribution has been tested to fit all the particle spectra at mid-rapidity from central events produced in d + Au, Cu + Cu, and Au + Au collisions at RHIC and p + Pb, Pb + Pb collisions at LHC. Even though there are strong medium effects in Cu + Cu and Au + Au collisions, the results show that the Tsallis distribution can be used to fit most of particle spectra in the collisions studied except in Au + Au collisions where some deviations are seen for proton andΛat lowpT. In addition, as the Tsallis distribution can only fit part of the particle spectra produced in Pb + Pb collisions wherepTis up to 20 GeV/c, a new formula with one more fitting degree of freedom is proposed in order to reproduce the entirepTregion.
机译:已经测试了Tsallis分布,以拟合在RHIC的d + Au,Cu + Cu和Au + Au碰撞以及在LHC的p + Pb,Pb + Pb碰撞中产生的中心事件所产生的中速处的所有粒子光谱。即使在Cu + Cu和Au + Au碰撞中有很强的介质效应,结果表明Tsallis分布可用于拟合所研究碰撞中的大多数粒子光谱,但在Au + Au碰撞中质子会有一些偏差并且在lowpT处。另外,由于Tsallis分布只能拟合在pTis高达20 GeV / c的Pb + Pb碰撞中产生的部分粒子光谱,因此提出了一个具有更大拟合自由度的新公式以重现整个pT区域。

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