Long-range Electron Spin-spin Interactions from Unparticle Exchange

Understand

Unparticles as suggested by Georgi are identities that are not constrained by dispersion relations but are governed by their scaling dimension, d.

• Their coupling to particles can result in macroscopic interactions between matter, that are generally an inverse nonintegral power of distance.
• This is totally different from known macroscopic forces.
• We use the precisely measured long-ranged spin-spin interaction of electrons to constrain unparticle couplings to the electron.