As such, the core is readily detectable using conventional and inexpensive particle detectors and veto techniques for a small event flux in the energy range of interest should be straightforward. Such primaries arrive with a frequency of about ten per day over the roughly one square metre of resonant bar area. At a more extreme level, we would expect a core energy of about 10TeV once per year. Roughly half of the 10TeV will be in the remaining central particle and one might expect to see a core with 50000 particles about once per year. This is indeed what is found.
Core hadrons are energetic and are thus rather penetrating.
They will lose a substantial fraction, but not all, of their energy in traversing a few tens of gcm of gravitational detector. Such impulses may well be detectable as noise in the antenna. High Energy Muons EAS have muons as one of their significant components and the majority of the overall cosmic ray background consists of unaccompanied muons. Clearly, rates such as this cannot be vetoed for systems which have bandwidths only up to the kHz range. Air shower muons have characteristic energies in the GeV range and so typical individual muons will not be a major gravitational noise problem.