A precise calculation of delayed coincidence selection efficiency and accidental coincidence rate

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YU Jing-Yi, WANG Zhe and CHEN Shao-Min. A precise calculation of delayed coincidence selection efficiency and accidental coincidence rate[J]. Chinese Physics C, 2015, 39(5): 056201. doi: 10.1088/1674-1137/39/5/056201
YU Jing-Yi, WANG Zhe and CHEN Shao-Min. A precise calculation of delayed coincidence selection efficiency and accidental coincidence rate[J]. Chinese Physics C, 2015, 39(5): 056201.  doi: 10.1088/1674-1137/39/5/056201 shu
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Received: 2014-09-04
Revised: 2014-11-15
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A precise calculation of delayed coincidence selection efficiency and accidental coincidence rate

    Corresponding author: WANG Zhe,

Abstract: A precise background evaluation model is proposed to address the complex data structure of the delayed coincidence method, which is widely used in reactor electron-antineutrino oscillation experiments. In this model, effects from the muon veto, uncorrelated random background, and background are all studied analytically, simplifying the estimation of the systematic uncertainties of signal efficiency and accidental background rate. The results of the calculations are validated numerically with a number of simulation studies and also applied and validated in the recent Daya Bay hydrogen-capture based oscillation measurement.

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