humanino
Jun21-07, 08:54 AM
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 (http://arxiv.org/abs/hep-ph/0703260) 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 :smile:
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 (http://arxiv.org/abs/hep-ph/0703260) 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 :smile: