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Weak charge and weak radius of 12C
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We present a feasibility study of a simultaneous subpercent extraction of the weak charge and the weak radius of the 12C nucleus using parity-violating electron scattering, based on a largely model-independent assessment of the uncertainties. The corresponding measurement is considered to be carried out at the future MESA facility in Mainz with beam=155MeV. We find that a combination of a 0.3% precise measurement of the parity-violating asymmetry at forward angles with a 10% measurement at backward angles will allow to determine the weak charge and the weak radius of 12C with 0.4% and 0.5% precision, respectively. These values could be improved to 0.3% and 0.2% for a 3% backward measurement. This experimental program will have impact on precision low-energy tests in the electroweak sector and nuclear structure.
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KOSHCHII, Oleksandr, ERLER, Jens, GORCHTEIN, Mikhail, HOROWITZ, Charles j., PIEKAREWICZ, Jorge, ROCA MAZA, Xavier, SENG, Chien-yeah, SPIESBERGER, Hubert. Weak charge and weak radius of 12C. _Physical Review C_. 2020. Vol. 102, núm. 1-6. [consulta: 20 de gener de 2026]. ISSN: 2469-9985. [Disponible a: https://hdl.handle.net/2445/216197]