Towards Precision Muonic X-ray Measurements of Charge Radii of Light Nuclei

We, the QUARTET Collaboration, propose an experiment to measure the nuclear charge radii of light elements with up to 20 times higher accuracy. These are essential both for understanding nuclear physics at low energies, and for experimental and theoretical applications in simple atomic systems. Such comparisons advance the understanding of bound-state quantum electrodynamics and are useful for searching for new physics beyond the Standard Model. The energy levels of muonic atoms are highly susceptible to nuclear structure, especially to the mean square charge radius. The radii of the lightest nuclei (with the atomic number, (Formula presented.)) have been determined with high accuracy using laser spectroscopy in muonic atoms, while those of medium mass and above were determined using X-ray spectroscopy with semiconductor detectors. In this communication, we present a new experiment, aiming to obtain precision measurements of the radii of light nuclei (Formula presented.) using single-photon energy measurements with cryogenic microcalorimeters; a quantum-sensing technology capable of high efficiency with outstanding resolution for low-energy X-rays.

Descrição

Funding Information: B.O. is thankful for the support of the Council for Higher Education Program for Hiring Outstanding Faculty Members in Quantum Science and Technology. The Kirchhoff Institute for Physics group at Heidelberg University is supported by Field Of Focus II initiative at Heidelberg University. D.U. acknowledges the support by the Research Training Group HighRR (GRK 2058) funded through the Deutsche Forschungsgemeinschaft, DFG. The work of the KU Leuven group is supported by FWO-Vlaanderen (Belgium), KU Leuven BOF C14/22/104, and European Research Council, grant no. 101088504 (NSHAPE). P.N. acknowledges support from the NSERC Grant No. SAPIN-2022-00019. TRIUMF receives federal funding via a contribution agreement with the National Research Council of Canada. The Lisboa group is supported in part by Fundação para a Ciência e Tecnologia (FCT; Portugal) through research center Grant No. UID/FIS/04559/2020 to LIBPhys-UNL. The work of the ETH group was supported by the ETH Research Grant 22-2 ETH-023, Switzerland. Publisher Copyright: © 2024 by the authors.

Palavras-chave

bound-state quantum electrodynamics (QED) charge radius metallic magnetic calorimeter (MMC) muonic atoms nuclear structure simple atomic systems X-ray General Physics and Astronomy

URI

http://hdl.handle.net/10362/172643

DOI

10.3390/physics6010015

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Home collection (FCT)

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