Latest results of the antineutrino flux and spectrum from Daya Bay

The antineutrino flux and spectrum from the reactors at Daya Bay are monitored by the near detectors in Daya Bay reactor neutrino experiment. The antineutrino flux from reactors is found to be about 5% less than prediction, and a 5 MeV bump is found when comparing the measured spectrum from Daya Bay and prediction. By studying the fuel evolution the IBD yield of 235 U and 239 Pu is obtained. With more statistics and more precise energy nonlinearity model, an improved measurement of the antineutrino spectrum is obtained. The shape of the detected antineutrino spectrum disagrees with the prediction from Huber-Mueller model at 5.3σ. The local deviation reaches 6.3σ in the energy region between 4 to 6 MeV.