超子数分布累积量的纯度修正
Purity correction for cumulants of hyperon number distribution
摘要：
我们提出了一个纯度修正，以扣除组合背景的影响，超子数分布的累积量。我们认为，累积量和混合累积量的边带，其产量是可比的背景粒子在信号区，可以用于校正。通过引入重建效率和背景的影响，在一个简单的玩具模型中演示了该方法。我们表明，超子重建的拓扑切割参数可以优化，以达到最佳的统计意义后，纯度和效率的校正。该方法将使我们能够测量净重子，净奇异值的累积量，以及它们的相关性与更好的品质因数比传统的方法。
英文摘要：
We propose a purity correction to subtract effects of combinatorial backgrounds from cumulants of hyperon number distributions. We argue that cumulants and mix-cumulants of sidebands, whose yield is comparable with that of background particles in the signal region, can be used for the correction. The method is demonstrated in a simple toy model by introducing effects of reconstruction efficiencies and backgrounds. We show that topological cut parameters for hyperon reconstructions can be optimized to achieve the best statistical significance after purity and efficiency corrections. The method will enable us to measure cumulants of net-baryon, net-strangenss, and their correlations with better figure of merit than the conventional approach.
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