1998/08/26 by Amitava Datta, S. Maity, Shyamapada Maity · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.59.055019
published as Phys.Rev. D59 (1999) 055019 · 27 pages, Latex
arxiv created 1998/08/26 · openalex publication_date 1999/02/10 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
It is shown that if the charginos decay into very soft leptons or hadrons + E/ due to degeneracy or near degeneracy with the lightest supersymmetric particle or the sneutrino, the observability of the recently proposed signal via the single photon (+ soft particles) + E/ channel crucially depends on the magnitude of the \stackrel\ifmmode \else \~\fi\ensuremathν mass due to destructive interferences in the matrix element squared. If the \stackrel\ifmmode \else \~\fi\ensuremathν's and, consequently, left sleptons are relatively light, the size of the signal, previously computed in the limit m_\stackrel\ifmmode \else \~\fi\ensuremathν\ensuremath→\ensuremath∞ only, is drastically reduced. We present the formula for the signal cross section in a model independent way and discuss the observability of the signal at CERN LEP 192 and NLC energies.