In addition to the well known 3D-Particle Tracking Velocimetry we may need to reserve also 3D- UnParticle Tracking Velocimetry, don’t you think so?

What Does an Unparticle Look Like? What is an unparticle? | Science Quick Picks

The hunt for unparticles is on.
‘When the Large Hadron Collider turns on next year, most physicists
will be scouring the high-energy data for new particles such
as the Higgs boson. Not Howard Georgi of Harvard University in the US,
though - he says he is on the look out for a new type of “stuff”
altogether called “unparticles”. If it exists, it would mean that our
Standard Model of particle physics is not the whole story, and that
things other than particles fill the universe (Phys. Rev. Lett. 98 221601).
Unparticles would have properties in common with neutrinos, which have
almost zero mass and are therefore nearly scale invariant. Neutrinos
barely interact with matter – most of the time physicists can only
infer their presence by calculating the “missing” energy and momentum
after an interaction. By looking at the same interaction many times, a
probability distribution is built up that tells more specifically how
many and what sort of neutrinos are involved.
Georgi thinks that a similar technique could be used to search for
evidence of unparticles. According to scale invariance, a distribution
containing unparticles would become apparent because, oddly, it would
look like a distribution for a fractional number of massless particles.’

See also: Professor proposes theory of unparticle physics.
‘Howard Georgi, a physicist at Harvard University, has recently
published a paper on so-called unparticle physics, which suggests the
existence of “unparticle stuff” that cannot be accounted for by the
standard model. Appearing in a recent edition of Physical Review Letters, the paper says that unparticle stuff would be very different than anything seen before.’