It is not implausible that different particles would be characterized by different values of 
. This in particular could
reflect the expectation that more pointlike particles, such as neutrinos, should be more sensitive to the spacetime-lattice
structure with respect to composite particles (such as protons and, even more evidently, atoms). However, it appears natural to
assume [396
], at least in these first explorations of causal-set phenomenology, that different particles would have values of 
that are not too far apart.
