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Study of the data taking strategy for a high precision τ mass measurement

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To achieve a high precision τ mass measurement at BESIII, two free para-meters (mτ and ε) and three parameters (mτε and σBG)fittings are simulated using sampling technique. For two parameters fitting, two points should be taken, the one is near the threshold of τ+τ- production to determine mτ , the other point is at 3.595 GeV to determine e±ciency. The ratio of luminosity at the two points is 3 to 1. For three parameters fitting, one point should be added at the low energy region with about 10% of the total luminosity. The optimal ratio of luminosity at the other two points is still 3 to 1.
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Recommended references: Y.K.Wang,J.Y.Zhang,X.H.Mo,C.Z.Yuan.(2017).Study of the data taking strategy for a high precision τ mass measurement.[ChinaXiv:201703.00615] (Click&Copy)
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[V1] 2017-03-26 19:36:59 chinaXiv:201703.00615V1 Download
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