What Are the Implications of Unparticle Physics?

[humanino]

Hi everyone,

lately I have been rather busy, but I keep seeing papers untitles "Unparticle" + something on the arXiv popping out every now and then. So today I decided I would take a look at this odd stuff. I found a paper from Georgi in particular where the conept seems to be introduced first.

I discuss some simple aspects of the low-energy physics of a nontrivial scale invariant sector of an effective field theory — physics that cannot be described in terms of particles. I argue that it is important to take seriously the possibility that the unparticle stuff described by such a theory might actually exist in our world. I suggest a scenario in which some details of the production of unparticle stuff can be calculated. I find that in the appropriate low energy limit, unparticle stuff with scale dimension dU looks like a non-integral number $$d_U$$ of invisible particles. Thus dramatic evidence for a nontrivial scale invariant sector could show up experimentally in missing energy distributions.

I must admit that it puzzled me a little bit, and I will probably print this paper and read it tonight. In the meantime, I guess I could greatly benefit from a few informal comments about this subject. Is anybody familiar with this new stuff ?

Thanks in advance for any help

 

[arivero]

I also noticed the trend last week. It is getting a lot of citations, but I wonder if it is just because of boredoom.

 

[arivero]

Really it is getting a lot of attention:

http://www.citebase.org/search?type=identifier&maxrows=10&identifier=oai%3AarXiv.org%3Ahep-ph%2F0703260&order=DESC&rank=lastupdate

 

[Rade]

An interview with Dr. Georgi:

http://sciencebrad.livejournal.com/153383.html