Another candidate for 'triple tracks'? http://www.eurekalert.org/pub_releases/2009-12/ru-rpf121109.php
Dunno, but it is interesting in the context of UCN - ultracold neutrons, since the "trimer" phenomenon does require ultracold. Aside from that, the connection to SPARWAR triple tracks is weak. "Using atoms at temperatures colder than deep space, Rice University physicists have delivered overwhelming proof for a once-scoffed-at theory that's become a hotbed for research some 40 years after it first appeared. In a paper available online in Science Express, Rice's team offers experimental evidence for a universal quantum mechanism that allows trios of particles to appear and reappear at higher energy levels in an infinite progression. The triplets, often called trimers, form in special cases where pairs cannot."
