Abstract
We present the results on the radius of the neutron distribution in $^{40}\text{Ar}$, on the low-energy value of the weak mixing angle, and on the electromagnetic properties of neutrinos obtained from the analysis of the coherent neutrino-nucleus elastic scattering data in argon recently published by the COHERENT collaboration, taking into account proper radiative corrections. We present also the results of the combined analysis of the COHERENT argon and cesium-iodide data for the determination of the low-energy value of the weak mixing angle and the electromagnetic properties of neutrinos. In particular, the COHERENT argon data allow us to improve significantly the only existing laboratory bounds on the electric charge $q_{\mu\mu}$ of the muon neutrino and on the transition electric charge $q_{\mu\tau}$.
Highlights
The observation of coherent elastic neutrino-nucleus scattering (CEνNS) in cesium iodide performed in 2017 by the COHERENT experiment [1,2] unlocked an innovative and powerful tool to study many and diverse physical phenomena [3,4,5,6,7,8,9,10,11,12]
We present the results on the radius of the neutron distribution in 40Ar, on the low-energy value of the weak mixing angle, and on the electromagnetic properties of neutrinos obtained from the analysis of the coherent neutrino-nucleus elastic scattering data in argon recently published by the COHERENT Collaboration, taking into account proper radiative corrections
We present the bounds on different parameters of the EW interaction and neutrino electromagnetic properties obtained analyzing the new COHERENT Ar data and those obtained with a combined analysis of the COHERENT Cesium iodide (CsI) and Ar data, using the results of the analysis of the CsI data in Ref. [15]
Summary
The observation of coherent elastic neutrino-nucleus scattering (CEνNS) in cesium iodide performed in 2017 by the COHERENT experiment [1,2] unlocked an innovative and powerful tool to study many and diverse physical phenomena [3,4,5,6,7,8,9,10,11,12]. The experimental challenge behind this analysis is the need to observe nuclear recoils with a very small kinetic energy Tnr. of a few keV, and the need of a low nuclearrecoil-energy threshold, in the presence of a larger background, when compared to the cesium-iodide case. Of a few keV, and the need of a low nuclearrecoil-energy threshold, in the presence of a larger background, when compared to the cesium-iodide case This requirement is necessary for the coherent recoil of tpheffiffiffiffinffiffiffiuffifficffiffilffieffi us which occurs for jq⃗ jR ≪ 1 [14], where jq⃗ j ≃. We present the bounds on different parameters of the EW interaction and neutrino electromagnetic properties obtained analyzing the new COHERENT Ar data and those obtained with a combined analysis of the COHERENT Cesium iodide (CsI) and Ar data, using the results of the analysis of the CsI data in Ref.
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