Exploiting the directional sensitivity of the Double Chooz near detector

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dc.creatorHochmuth, Kathrin A.
dc.creatorLindner, Manfred
dc.creatorRaffelt, Georg G.
dc.date2007-04-23
dc.date.accessioned2026-07-07T10:59:43Z
dc.date.available2026-07-07T10:59:43Z
dc.descriptionIn scintillator detectors, the forward displacement of the neutron in the reaction $\barν_e+p\to e^++n$ provides neutrino directional information as demonstrated by the CHOOZ reactor experiment with 2,500 events. The near detector of the forthcoming Double Chooz experiment will collect $1.6\times10^5$ events per year, enough to determine the average neutrino direction with a $1 σ$ half-cone aperture of $2.3^\circ$ in one year. It is more difficult to separate the two Chooz reactors that are viewed at a separation angle $ϕ=30^\circ$. If their strengths are known and approximately equal, the azimuthal location of each reactor is obtained with $\pm6^\circ$ ($1 σ$) and the probability of confusing them with a single source is less than 11%. Five year's data reduce this ``confusion probability'' to less than 0.3%, i.e., a $3 σ$ separation is possible. All of these numbers improve rapidly with increasing angular separation of the sources. For a setup with $ϕ=90^\circ$ and one year's data, the azimuthal $1 σ$ uncertainty for each source decreases to $\pm3.2^\circ$. Of course, for Double Chooz the two reactor locations are known, allowing one instead to measure their individual one-year integrated power output to $\pm11%$ ($1 σ$), and their five-year integrated output to $\pm4.8%$ ($1 σ$).
dc.description7 pages, 10 figures
dc.identifierhttps://arxiv.org/abs/0704.3000
dc.identifierhttp://arxiv.org/abs/0704.3000
dc.identifierPhys.Rev.D76:073001,2007
dc.identifierdoi:10.1103/PhysRevD.76.073001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187496
dc.subjectHigh Energy Physics - Phenomenology
dc.titleExploiting the directional sensitivity of the Double Chooz near detector
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