Exploring low-energy neutrino physics with the Coherent Neutrino Nucleus Interaction Experiment (CONNIE). (arXiv:1906.02200v1 [physics.ins-det])
<a href="http://arxiv.org/find/physics/1/au:+Aguilar_Arevalo_A/0/1/0/all/0/1">Alexis Aguilar-Arevalo</a>, <a href="http://arxiv.org/find/physics/1/au:+Bertou_X/0/1/0/all/0/1">Xavier Bertou</a>, <a href="http://arxiv.org/find/physics/1/au:+Bonifazi_C/0/1/0/all/0/1">Carla Bonifazi</a>, <a href="http://arxiv.org/find/physics/1/au:+Cancelo_G/0/1/0/all/0/1">Gustavo Cancelo</a>, <a href="http://arxiv.org/find/physics/1/au:+Castaneda_A/0/1/0/all/0/1">Alejandro Castañeda</a>, <a href="http://arxiv.org/find/physics/1/au:+Vergara_B/0/1/0/all/0/1">Brenda Cervantes Vergara</a>, <a href="http://arxiv.org/find/physics/1/au:+Chavez_C/0/1/0/all/0/1">Claudio Chavez</a>, <a href="http://arxiv.org/find/physics/1/au:+DOlivo_J/0/1/0/all/0/1">Juan C. D'Olivo</a>, <a href="http://arxiv.org/find/physics/1/au:+Anjos_J/0/1/0/all/0/1">João C. dos Anjos</a>, <a href="http://arxiv.org/find/physics/1/au:+Estrada_J/0/1/0/all/0/1">Juan Estrada</a>, <a href="http://arxiv.org/find/physics/1/au:+Neto_A/0/1/0/all/0/1">Aldo R. Fernandes Neto</a>, <a href="http://arxiv.org/find/physics/1/au:+Moroni_G/0/1/0/all/0/1">Guillermo Fernandez Moroni</a>, <a href="http://arxiv.org/find/physics/1/au:+Foguel_A/0/1/0/all/0/1">Ana Foguel</a>, <a href="http://arxiv.org/find/physics/1/au:+Ford_R/0/1/0/all/0/1">Richard Ford</a>, <a href="http://arxiv.org/find/physics/1/au:+Cuevas_J/0/1/0/all/0/1">Juan Gonzalez Cuevas</a>, <a href="http://arxiv.org/find/physics/1/au:+Hernandez_P/0/1/0/all/0/1">Pamela Hernández</a>, <a href="http://arxiv.org/find/physics/1/au:+Hernandez_S/0/1/0/all/0/1">Susana Hernandez</a>, <a href="http://arxiv.org/find/physics/1/au:+Izraelevitch_F/0/1/0/all/0/1">Federico Izraelevitch</a>, <a href="http://arxiv.org/find/physics/1/au:+Kavner_A/0/1/0/all/0/1">Alexander R. Kavner</a>, <a href="http://arxiv.org/find/physics/1/au:+Kilminster_B/0/1/0/all/0/1">Ben Kilminster</a>, <a href="http://arxiv.org/find/physics/1/au:+Kuk_K/0/1/0/all/0/1">Kevin Kuk</a>, <a href="http://arxiv.org/find/physics/1/au:+Lima_H/0/1/0/all/0/1">H. P. Lima Jr</a>, <a href="http://arxiv.org/find/physics/1/au:+Makler_M/0/1/0/all/0/1">Martin Makler</a>, <a href="http://arxiv.org/find/physics/1/au:+Molina_J/0/1/0/all/0/1">Jorge Molina</a>, <a href="http://arxiv.org/find/physics/1/au:+Mota_P/0/1/0/all/0/1">Philipe Mota</a>, <a href="http://arxiv.org/find/physics/1/au:+Nasteva_I/0/1/0/all/0/1">Irina Nasteva</a>, <a href="http://arxiv.org/find/physics/1/au:+Romero_C/0/1/0/all/0/1">Carlos Romero</a>, <a href="http://arxiv.org/find/physics/1/au:+Sarkis_Y/0/1/0/all/0/1">Y. Sarkis</a>, <a href="http://arxiv.org/find/physics/1/au:+Haro_M/0/1/0/all/0/1">Miguel Sofo Haro</a>, <a href="http://arxiv.org/find/physics/1/au:+Souza_I/0/1/0/all/0/1">Iruatã M. S. Souza</a>, <a href="http://arxiv.org/find/physics/1/au:+Tiffenberg_J/0/1/0/all/0/1">Javier Tiffenberg</a>, <a href="http://arxiv.org/find/physics/1/au:+Wagner_S/0/1/0/all/0/1">Stefan Wagner</a> (CONNIE Collaboration)
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) uses low-noise
fully depleted charge-coupled devices (CCDs) with the goal of measuring
low-energy recoils from coherent elastic scattering (CE$nu$NS) of reactor
antineutrinos with silicon nuclei. This standard model process has not yet been
observed at recoil energies below 20 keV. We report here the first results of
the detector array deployed in 2016, with an active mass of 73.2 g (12 CCDs),
which is operating at a distance of 30 m from the core of the Angra 2 nuclear
reactor, with a thermal power of 3.8 GW. A search for neutrino events is
performed by comparing data collected with reactor on (2.1 kg-day) and reactor
off (1.6 kg-day). The results show no excess in the reactor-on data, reaching
the world record sensitivity down to recoil energies of about 1 keV (0.1 keV
electron-equivalent). A 95% confidence level limit for new physics is
established at an event rate of 40 times the one expected from the standard
model at this energy scale. The results presented here provide a new window to
the low-energy neutrino physics, which allows one to explore for the first time
the lowest energies accessible through the CE$nu$NS with antineutrinos from
nuclear reactors.
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) uses low-noise
fully depleted charge-coupled devices (CCDs) with the goal of measuring
low-energy recoils from coherent elastic scattering (CE$nu$NS) of reactor
antineutrinos with silicon nuclei. This standard model process has not yet been
observed at recoil energies below 20 keV. We report here the first results of
the detector array deployed in 2016, with an active mass of 73.2 g (12 CCDs),
which is operating at a distance of 30 m from the core of the Angra 2 nuclear
reactor, with a thermal power of 3.8 GW. A search for neutrino events is
performed by comparing data collected with reactor on (2.1 kg-day) and reactor
off (1.6 kg-day). The results show no excess in the reactor-on data, reaching
the world record sensitivity down to recoil energies of about 1 keV (0.1 keV
electron-equivalent). A 95% confidence level limit for new physics is
established at an event rate of 40 times the one expected from the standard
model at this energy scale. The results presented here provide a new window to
the low-energy neutrino physics, which allows one to explore for the first time
the lowest energies accessible through the CE$nu$NS with antineutrinos from
nuclear reactors.
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