Short-Baseline antinu_mu -> antinu_e Oscillations

TL;DR

This paper examines short-baseline antineutrino oscillation data from multiple experiments within a model-independent framework, identifying compatible parameter regions that suggest potential new physics beyond the standard model.

Contribution

It provides a combined analysis of MiniBooNE, LSND, and KARMEN data, incorporating reactor constraints to identify favored oscillation parameter regions in a minimal model-independent approach.

Findings

Data from three experiments are compatible within the analyzed parameter space.

Favored oscillation parameters are within 0.002 < sin^2 2θ < 0.05 and 0.2 < Δm^2 < 2 eV^2.

Reactor experiment constraints support the allowed parameter regions.

Abstract

We analyze the recent results of the MiniBooNE short-baseline experiment on antinu_mu -> antinu_e oscillations in a minimal model-independent framework of antineutrino mixing in conjunction with the positive LSND signal and the negative KARMEN measurements. We show that the data of the three short-baseline antinu_mu -> antinu_e experiments are compatible. Taking into account also the model-independent constraints due to the limits on short-baseline antinu_e disappearance obtained in reactor antineutrino experiments, we find that the favored region of the effective oscillation parameters lies within 0.002 <~ sin^2 2 theta <~ 0.05 and 0.2 <~ Delta m^2 <~ 2 eV^2.