2005/12/31 by Tuomas Honkavaara, Katri Huitu, S. Roy +1 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.73.055011
published as Phys.Rev. D73 (2006) 055011 · 26 pages, 6 figures, RevTeX4. Discussion and references added. Typos corrected. To appear in Phys. Rev. D
arxiv created 2006/03/17 · openalex publication_date 2006/03/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Sneutrino-antisneutrino mixing occurs in a supersymmetric model where neutrinos have nonzero Majorana masses. This can lead to the sneutrino decaying into a final state with a ``wrong-sign charged lepton''. Hence, in an e^\ensuremath-\ensuremathγ collider, the signal of the associated production of an electron-sneutrino and the lighter chargino and their subsequent decays can be e^\ensuremath-\ensuremathγ\ensuremath→e+\stackrel\texttildelow\ensuremathτ1^\ensuremath-\stackrel\texttildelow\ensuremathτ1^\ensuremath-+\mathrmp\ensuremath\llap\not T where the \stackrel\texttildelow\ensuremathτ1s are long-lived and can produce heavily ionizing charged tracks. This signal is free of any Standard Model background and the supersymmetric backgrounds are small. Such a signal can be experimentally observable under certain conditions which are possible to obtain in an anomaly-mediated supersymmetry breaking scenario. Information on a particular combination of the neutrino masses and mixing angles can also be extracted through the observation of this signal. Possible modifications in the signal event and the accompanying Standard Model background have been discussed when the \stackrel\texttildelow\ensuremathτ1s decay promptly.