Supersymmetric photonic signals at LEP
High Energy Physics - Phenomenology
2009-08-25 v2 High Energy Physics - Experiment
Abstract
We explore and contrast the single-photon and diphoton signals expected at LEP 2, that arise from neutralino-gravitino (e^+ e^- -> chi + gravitino -> gamma + E_miss) and neutralino-neutralino (e^+ e^- -> chi + chi -> gamma + gamma + E_miss) production in supersymmetric models with a light gravitino. LEP 1 limits imply that one may observe either one, but not both, of these signals at LEP 2, depending on the values of the neutralino and gravitino masses: single-photons for m_chi > Mz and m_gravitino < 3 x 10^-5 eV; diphotons for m_chi < Mz and all allowed values of m_gravitino.
Keywords
Cite
@article{arxiv.hep-ph/9609524,
title = {Supersymmetric photonic signals at LEP},
author = {J. Lopez and D. Nanopoulos and A. Zichichi},
journal= {arXiv preprint arXiv:hep-ph/9609524},
year = {2009}
}
Comments
11 pages, LaTeX, 4 figures (included). Shortened version to appear in Physical Review Letters