Although this experiment was not designed or optimized to search for an additional short-range force
, nevertheless it allowed us to slightly improve the published boundary in the nanometer range of characteristic distances.
There had to be a short-range force
like that of the weak interaction, one that could be felt only within the nucleus.
The other part of the model is the theory called electroweak or sometimes electroasthenodynamics, which covers particles and phenomena animated by the electromagnetic force and the other kind of short-range force
, the "weak' interaction.
In this contribution, we estimate an upper limit on an additional attractive short-range force
, which could be established from this experiment in a model-independent way .
A typical AFM senses so-called "van der Waals forces," very short-range forces
exerted by molecules or atoms.