Flavour and polarisation in heavy neutrino production at e+ e- colliders
High Energy Physics - Phenomenology
2010-04-05 v3
Abstract
We analyse l W nu production at ILC, paying special attention to the role of the final lepton flavour and beam polarisation in the search for a new heavy neutrino N. We show that a sizeable coupling to the electron V_eN ~ 10^-2 is necessary to have an observable signal in any of the channels, despite the fact that the signal may be more visible in muon or tau final states. The non-observation of a heavy neutrino at ILC will improve the present upper bound on its mixing with the electron by more than one order of magnitude, V_eN < 0.007 for m_N between 200 and 400 GeV.
Cite
@article{arxiv.hep-ph/0502189,
title = {Flavour and polarisation in heavy neutrino production at e+ e- colliders},
author = {F. del Aguila and J. A. Aguilar-Saavedra and A. Martinez de la Ossa and D. Meloni},
journal= {arXiv preprint arXiv:hep-ph/0502189},
year = {2010}
}
Comments
17 pages, 5 PS figures. References added. To be published in PLB