1. A new measurement of the elastic cross section at very low energy
- Author
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Carlo Broggini, Z. Daraktchieva, C. Cerna, Claude Amsler, G. Gervasio, J Lamblin, A. Stutz, G. Puglierin, J.-L. Vuilleumier, D. Lebrun, O. Link, P Jeanneret, J. Busto, M. Avenier, A. Tadsen, G Jonkmans, D.H. Koang, and F. Ould-Saada
- Subjects
Physics ,Nuclear and High Energy Physics ,Time projection chamber ,Physics::Instrumentation and Detectors ,010308 nuclear & particles physics ,Solar neutrino ,Detector ,Electron ,Nuclear reactor ,7. Clean energy ,01 natural sciences ,law.invention ,Core (optical fiber) ,Nuclear physics ,Cross section (physics) ,law ,0103 physical sciences ,010306 general physics ,Energy (signal processing) - Abstract
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 1.5σ higher than the ones predicted by the standard model.
- Published
- 2002
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