Studying Neutrino Directionality with Double Chooz

TL;DR

This paper explores the potential of using neutrino directionality measurements in the Double Chooz experiment to improve background separation and source localization, building on previous CHOOZ results.

Contribution

It investigates the feasibility and potential enhancement of neutrino source localization using directionality in the Double Chooz experiment, aiming to reduce systematic uncertainties.

Findings

Initial measurement of  with 100 days of data

Backgrounds significantly affect systematic uncertainties

Potential for improved source localization with directionality analysis

Abstract

The first results from Double Chooz with 100 days of data measured $\sin^2(2\theta_{13}) = 0.086 \pm 0.051$. Backgrounds contribute significantly to the systematic uncertainty budget. Using the incoming neutrino directionality we will attempt to further separate the inverse beta decay signal from backgrounds. The CHOOZ experiment completed a similar analysis and found that the neutrino source can be located to within a cone of half-aperture of 18 degrees at the 68% C.L. We study the possible improvement of this result by Double Chooz.