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With the advent of detectors with sub-keV sensitivities, atomic ionization has been identified as a promising avenue to probe possible neutrino electromagnetic properties. The interaction cross sections induced by millicharged neutrinos are evaluated with the ab initio multiconfiguration relativistic random-phase approximation. There is significant enhancement at atomic binding energies compared to that when the electrons are taken as free particles. Positive signals would distinctly manifest as peaks at specific energies with known intensity ratios. Selected reactor neutrino data with germanium detectors at an analysis threshold as low as 300 eV are studied. No such signatures are observed, and a combined limit on the neutrino charge fraction of ∣δQ∣ < 1.0 ✕ 10-12 at 90% confidence level is derived. [ABSTRACT FROM AUTHOR]

The article examines the factors contributed to the data analysis on a millicharged neutrinos from atomic ionizations with germanium detectors. It outlines the significant interactions which enhances the atomic binding energies of electrons and free particles. The physical and experimental consequences of finite neutrino masses is also explored.

The article discusses a research that investigates the constraints on millicharged neutrino via analysis of data from atomic ionizations with germanium detectors. Details about the identification of sub-keV sensitivities, atomic ionization as a promising avenue to probe neutrino electromagnetic properties are noted. Also provided is the data of selected reactor neutrino data with germanium detectors at analysis threshold as low as 300 eV.

The article discusses the study that explores the constraints of millicharged neutrinos by analyzing the data of atomic ionizations. It outlines the importance to explore the properties and interactions of neutrinos to provide hints to new physics beyond the Standard Model (SM). Result claim that charge-induced interactions may demonstrate the enhancement at atomic binding energies.

The article presents the study on millicharged neutrinos constraints using data from an atomic ionization. It details how the study was conducted which involved the results of an atomic ionization data analysis involving germanium detectors at sub-keV sensitivities. Also provided is information on millicharged neutrinos' laboratory limit, the origin of electric charge quantization, and background of finite neutrino masses and mixings.

The electromagnetic properties of neutrinos, which are either trivial or negligible in the context of the Standard Model, can probe new physics and have significant implications in astrophysics and cosmology. The current best direct limits on the neutrino millicharges and magnetic moments are both derived from data taken with germanium detectors with low thresholds at keV levels. In this paper, we discuss in detail a robust, ab initio method: the multiconfiguration relativistic random-phase approximation, that enables us to reliably understand the germanium detector response at the sub-keV level, where atomic many-body physics matters. By using existing data with sub-keV thresholds, limits on the reactor antineutrino's millicharge, magnetic moment, and charge radius squared are derived. The projected sensitivities for next-generation experiments are also given and discussed. [ABSTRACT FROM AUTHOR]