Updated Summation Model: An Improved Agreement with the Daya Bay Antineutrino Fluxes

Understand

A new summation method model of the reactor antineutrino energy spectrum is presented.

• It is updated with the most recent evaluated decay databases and with our Total Absorption Gamma-ray Spectroscopy measurements performed during the last decade.
• For the first time the spectral measurements from the Daya Bay experiment are compared with the detected antineutrino energy spectrum computed with the updated summation method without any renormalisation.
• The results exhibit a better agreement than is obtained with the Huber-Mueller model in the 2 to 5 MeV range, the region which dominates the detected flux.