Constraints from Solar and Reactor Neutrinos on Unparticle Long-Range Forces

Understand

We have investigated the impact of long-range forces induced by unparticle operators of scalar, vector and tensor nature coupled to fermions in the interpretation of solar neutrinos and KamLAND data.

• If the unparticle couplings to the neutrinos are mildly non-universal, such long-range forces will not factorize out in the neutrino flavour evolution.
• As a consequence large deviations from the observed standard matter-induced oscillation pattern for solar neutrinos would be generated.
• In this case, severe limits can be set on the infrared fix point scale, Lambda_u, and the new physics scale, M, as a function of the ultraviolet (d_UV) and anomalous (d) dimension of the unparticle operator.