Neutrino Decays and Neutrino Electron Elastic Scattering in Unparticle Physics

Understand

Following Georgi's unparticle scheme, we examine the effective couplings between neutrinos and unparticle operators.

• As an immediate consequence, neutrinos become unstable and can decay into the unparticle stuff.
• Assuming the dimension transmutation scale is around $\Lambda^{}_{\cal U} \sim 1 ~{\rm TeV}$, we implement the cosmological limit on the neutrino lifetime to constrain the neutrino-unparticle couplings for different scaling dimensions $d$.
• In addition, provided that the electron-unparticle coupling is restricted due to the precise measurement of the anomalous magnetic moment of electron, we calculate the unparticle contribution to the neutrino-electron elastic scattering.