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arXiv 2209.01883hep-phnucl-th
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Au+Au碰撞中质子数涨落的HADES数据的可能来源

Possible origin of HADES data on proton number fluctuations in Au+Au collisions

O. Savchuk, R. V. Poberezhnyuk, M. I. Gorenstein

摘要:

HADES合作组最近在$\sqrt{s_{\rm NN}}=2.4$ GeV的Au+Au中心碰撞中的数据表明,在一个快度单位内,在中快度附近有很大的质子数起伏。这可能是由于重子之间的强吸引相互作用而引起的临界现象的特征。我们研究了另一种假设,即这些大的波动是由事件的裸露质子的数量的波动,并假设这些质子之间没有相互作用。用二项式接受程序计算了$ΔY=1$区内五个对称快度区间$Δy$的质子数涨落。这一过程假设质子的独立(不相关)发射,它似乎与HADES数据一致。为了检验这个简单的图像,我们建议计算非重叠快度区间中质子多重数之间的相关,把$Δy_1$和$Δy_2$放在$ΔY=1$中。

英文摘要:

Recent data of the HADES Collaboration in Au+Au central collisions at $\sqrt{s_{\rm NN}}=2.4$ GeV indicate large proton number fluctuations inside one unit of rapidity around midrapidity. This can be a signature of critical phenomena due to the strong attractive interactions between baryons. We study an alternative hypothesis that these large fluctuations are caused by the event-by-event fluctuations of the number of bare protons, and no interactions between these protons are assumed. The proton number fluctuations in five symmetric rapidity intervals $Δy$ inside the region $ΔY=1$ are calculated using the binomial acceptance procedure. This procedure assumes the independent (uncorrelated) emission of protons, and it appears to be in agreement with the HADES data. To check this simple picture we suggest to calculate the correlation between proton multiplicities in non-overlapping rapidity intervals $Δy_1$ and $Δy_2$ placed inside $ΔY=1$.

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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