Large Short-Baseline antinu_mu Disappearance

TL;DR

This paper analyzes multiple neutrino oscillation datasets within a 3+1 antineutrino mixing framework, predicting significant short-baseline antinu_mu disappearance that can be tested in future experiments.

Contribution

It provides a combined analysis of diverse short- and long-baseline neutrino data, predicting a measurable antinu_mu disappearance signal in the 0.2 to 1 eV^2 mass-squared difference range.

Findings

Short-baseline antinu_mu disappearance is relatively large.

Predicted effective amplitude sin^2 2θ_{μμ} >~ 0.1.

Disappearance could be observed in upcoming experiments.

Abstract

We analyze the LSND, KARMEN and MiniBooNE data on short-baseline antinu_mu -> antinu_e oscillations and the data on short-baseline antinu_e disappearance obtained in the Bugey-3 and CHOOZ reactor experiments in the framework of 3+1 antineutrino mixing, taking into account the MINOS observation of long-baseline antinu_mu disappearance and the KamLAND observation of very-long-baseline antinu_e disappearance. We show that the fit of the data implies that the short-baseline disappearance of antinu_mu is relatively large. We obtain a prediction of an effective amplitude sin^2 2 theta_{mu mu} >~ 0.1 for short-baseline antinu_mu disappearance generated by 0.2 <~ Delta m^2 <~ 1 eV^2, which could be measured in future experiments.