A Precise Calculation of Delayed Coincidence Selection Efficiency and Accidental Coincidence Rate

Abstract

A model is proposed to address issues on the precise background evaluation due to the complex data structure defined by the delayed coincidence method, which is widely used in reactor electron-antineutrino oscillation experiments. In this model, the effects from the muon veto, uncorrelated random background, coincident signal and background are all studied with the analytical solutions, simplifying the estimation of the systematic uncertainties of signal efficiency and accidental background rate determined by the unstable single rate. The result of calculation is validated numerically with a number of simulation studies and is also applied and validated in the recent Daya Bay hydrogen-capture based oscillation measurement.

References in corpus (8)

• Observation of electron-antineutrino disappearance at Daya Bay
• Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment
• Indication for the disappearance of reactor electron antineutrinos in the Double Chooz experiment
• Reactor electron antineutrino disappearance in the Double Chooz experiment
• Spectral measurement of electron antineutrino oscillation amplitude and frequency at Daya Bay
• First Measurement of θ_13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment
• Determination of Neutrino Mass Hierarchy and Theta_13 with a Remote Detector of Reactor Antineutrinos
• Independent Measurement of Theta13 via Neutron Capture on Hydrogen at Daya Bay

Cited by in corpus (4)

• New measurement of ${\theta }_{13}$ via neutron capture on hydrogen at Daya Bay
• Measurement of Electron Antineutrino Oscillation Amplitude and Frequency via Neutron Capture on Hydrogen at Daya Bay
• Performance of the 1-ton Prototype Neutrino Detector at CJPL-I
• Search For Electron-Antineutrinos Associated With Gravitational-Wave Events GW150914, GW151012, GW151226, GW170104, GW170608, GW170814, and GW170817 at Daya Bay