Model independent constraints on four-lepton operators
Abstract
We obtain constraints on four-lepton interactions in the effective field theory with dimension-6 operators. To this end, we combine the experimental input from Z boson measurements in LEP-1, W boson mass and decays, muon and tau decays, lepton pair production in LEP-2, neutrino scattering on electrons, and parity violating electron scattering. The analysis does not rely on any assumptions about the flavor structure of the dimension-6 operators. Our main results are the confidence intervals for Wilson coefficients of 16 lepton-flavor conserving four-lepton operators, together with the full correlation matrix. Consequences for leptophilic models beyond the Standard Model are discussed.
Cite
@article{arxiv.1511.07434,
title = {Model independent constraints on four-lepton operators},
author = {Adam Falkowski and Kin Mimouni},
journal= {arXiv preprint arXiv:1511.07434},
year = {2016}
}
Comments
26 pages; v2: refs added, discussion of Michel parameters extended