Reactor Antineutrino Anomaly with known \theta_{13}

TL;DR

This paper reassesses the reactor antineutrino anomaly considering recent measurements of theta13, finding the anomaly's significance is reduced to about 1.4 sigma, suggesting less discrepancy than previously thought.

Contribution

It incorporates recent reactor flux independent theta13 measurements into the analysis, reducing the anomaly's significance and providing updated flux normalization results.

Findings

The world average flux ratio is 0.959 with combined uncertainties.

The anomaly's significance is weakened to about 1.4 sigma.

Upcoming experiments will further clarify the anomaly.

Abstract

We revisit the reactor antineutrino anomaly using the recent reactor flux independent determination of sizable theta?13 by considering the full set of the absolute reactor electron antineutrino flux measurements. When normalized to the predicted flux of Mueller et al. [1], the new world average, after including results from Palo Verde, Chooz, and Double Chooz, is 0.959 +- 0.009 (experiment uncertainty) +- 0.027 (flux systematics). Including the data with kilometer baseline, the new world average is only about 1.4 sigma lower than the unity, weakening the significance of the reactor antineutrino anomaly. The upcoming results from Daya Bay, RENO, and the Double Chooz will provide further information about this issue.