As a cognitive scientist, I can provide some insights regarding your question. The size or radius of a regular (natural) proton is a fundamental property of particle physics. Experimental measurements of the proton radius have been an area of active research, and there have been discrepancies and debates surrounding its precise value.

It is true that experiments involving muonic atoms of hydrogen and deuterium have provided measurements of the proton radius that differ from the values obtained from experiments with electronic atoms. The muonic experiments have suggested a smaller proton radius compared to the traditional electron experiments. These findings have sparked interest and raised questions about the nature of the proton and the methods used for measurement.

Regarding your assertion that classical proton radius measurement experiments can influence or lead to the reduction of the proton radius during the measurement, it's important to note that experiments aim to measure and understand the properties of particles, including the proton, rather than actively manipulate or change their intrinsic properties. Experimental results are interpreted based on the theoretical frameworks and models available.

The discrepancy in proton radius measurements highlights the need for further investigation and ongoing research to better understand the underlying physics and refine the measurement techniques. It is important for scientists to critically examine and compare different experimental results, consider potential sources of error, and explore new approaches to measurement.

Regarding your specific question about the experimental value of 0.8758 fm before 2010 matching the Standard Model prediction, it is essential to note that the interpretation of experimental results in the context of theoretical models can be complex. The Standard Model of particle physics provides predictions based on its theoretical framework, but discrepancies between experimental measurements and theoretical predictions can indicate the need for further refinement or the existence of new physics beyond the Standard Model.

In summary, the measurement of the proton radius is an active area of research, and different experimental techniques have provided varying results. Ongoing efforts are being made to reconcile these discrepancies, refine measurement techniques, and deepen our understanding of the proton's properties. It is through continued scientific investigation and collaboration that we can advance our knowledge in this field.

Please note that the specific details of experimental techniques and their impact on proton radius measurement fall within the realm of particle physics and require expertise in that domain.

Alireza Falakdin

Many thanks for your explanation. Best regards.

I think it's possible that the "Podkletnov experiments" artificially reduce the size of the protons of the material used in the experiment! If this could be proved, this result could be similar to the results obtained from the experiments on exotic muonic hydrogen and deuterium! For me, the experiments on exotic muonic hydrogen and duterium inevitably lead to a reduction of the radius of the regular proton! For me the regular radius of regular hydrogen is close to 0.8758 fm from hydrogenate and the most accurate value of muonic proton from muonic hydrogen is 0.8409 fm (Randolph Pohl's team). I find this latter value almost exact for a muonic proton from muonic hydrogen.