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The CONNIE experiment: upgrade and latest results

Authors: Sarkis, Youssef;

The CONNIE experiment: upgrade and latest results

Abstract

The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) is a neutrino experiment located at a distance of 30 m from the Angra 2 nuclear reactor (3.8 GWth) in Brazil. It uses low-noise, fully depleted charge-coupled devices (CCDs) to detect sub-keV energy recoils from CEνNS (coherent elastic neutrino-nucleus scattering) with silicon nuclei. The experiment has been active since 2016, maintaining a noise below 2 e− RMS with an active mass of ~50 g. The results derived from the data accumulated during the 2016–2018 run, with the reactor on and off, set a 95 C.L on the CEνNS signal. They were used to impose limits on the NSI parameters, which are competitive in the lower mass region of light neutral mediators. The experiment has been upgraded to host 2 skipper CCD sensors, it has been operating for ~4 months with these new generation detectors, achieving a noise lower than 0.2 e− RMS. Here, we report the latest results of CONNIE before the upgrade, based on the analysis of data collected in 2019, with an increased signal-to-noise ratio thanks to a different (1 x 5) binning in one direction. We also present the current status of the experiment and give an overview of the upcoming year of operations.

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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