On Tue, Mar 19, 2013 at 12:57 PM, Axil Axil <janap...@gmail.com> wrote: > http://physicsworld.com/cws/article/news/2007/jun/18/the-hunt-for-unparticles-is-on > > What are unparticles? Here is the explanation.
quote <<All particles exist in a state with a certain energy, momentum and mass. In most of the Standard Model, particles of the same type cannot exist in another state with all these properties scaled up or down by a common factor – electrons, for example, always have the same mass regardless of their energy or momentum. But this is not always the case: massless particles, such as photons, can exist with their properties scaled equally. This immunity to scaling is called "scale invariance". >> end quote. I find the terminology confounding! A photon is considered "scale invariant" because it is massless. However, photons have a wavelength, and a wavelength is certainly not a scale invariant property. If it were scale invariant, then an antenna of any size could be used to detect photons of any wavelength. Only the initiated could possibly know what they are talking about. Harry
