LHC sensitivity to lepton flavour violating Z boson decays
High Energy Physics - Phenomenology
2015-06-05 v2 High Energy Physics - Experiment
Abstract
We estimate that the LHC could set bounds BR(Z -> mu^\pm e^\mp) < 4.1 * 10^{-7} and BR(Z -> tau^\pm mu^\mp)< 3.5 * 10^{-6} (at 95% C.L.) with 20 inverse fb of data at 8 TeV. A similar sensitivity can be anticipated for Z -> tau^\pm e^\mp, because we consider leptonic tau decays such that Z -> tau^+ mu^- gives e^+ \mu^- +$ invisibles. These limits can be compared to the LEP1 bounds of order 10^{-5} to 10^{-6}. Such collider searches are sensitive to a flavour-changing effective Z coupling which is energy dependent, so are complementary to bounds obtained from tau to 3mu and mu to 3e.
Keywords
Cite
@article{arxiv.1207.4894,
title = {LHC sensitivity to lepton flavour violating Z boson decays},
author = {Sacha Davidson and Sylvain Lacroix and Patrice Verdier},
journal= {arXiv preprint arXiv:1207.4894},
year = {2015}
}
Comments
11 pages, 2 figures, version for publication