Draft: ATLASRECTS-5973: For now do the simplest thing to avoid division with very small numbers
This does the minimum to avoid the division with ~0 and help with the FPE without touching the core
logic of the code.
Also we need to avoid possible FPE on the std::sqrt(p*p)
We will prb need to dig a bit deeper on how the residuals in deltaE are defined
Edited by Christos Anastopoulos