A new measurment of the $\bar\nu_{e}e^{-}$ elastic cross section at very low energy
- Amsler, C.
- Avenier, M.
- Broggini, C.
- Busto, J.
- Cerna, C.
- Daraktchieva, Z.
- Gervasio, G.
- Jeanneret, P.
- Jonkmans, G.
- Koang, D.H.
- Lamblin, J.
- Lebrun, D.
- Link, O.
- Ould-Saada, F.
- Puglierin, G.
- Stutz, A.
- Tadsen, A.
- Vuilleumier, J.L.
DOIAbstract
We have built a low background detector, a time projection chamber surrounded by an active anti-Compton, to measure the ν e e − elastic cross section down to the antineutrino energy of 900 keV. With our detector, running at 18 m from the core of a nuclear reactor in Bugey, we could detect reactor antineutrinos by measuring both the energy and the direction of the recoiling electrons. We report here on a first analysis of the data using an automatic scanning procedure. The results we obtain are 1.5 σ higher than the ones predicted by the standard model. (Elsevier
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