Correlated decays of pair-produced scalar taus
Abstract
We study the quantum mechanical correlation between two identical neutralinos in the decays of minimal supersymmetric standard model (MSSM) scalar tau (stau) pair produced in e+e- annihilation. Generally, the decay products of scalar (spinless) particles are not correlated. We show that a correlation between two neutralinos appears near pair production threshold, due to a finite stau width and mixing of the staus and/or neutralinos, and because the neutralinos are Majorana. Because the correlation is significant only in a specific kinematical configuration, it can be observed only in supersymmetric models where the neutralino momenta can be kinematically reconstructed, such as in models with R-parity violation.
Cite
@article{arxiv.hep-ph/0512093,
title = {Correlated decays of pair-produced scalar taus},
author = {K. Hagiwara and K. Mawatari and D. Rainwater and T. Stelzer},
journal= {arXiv preprint arXiv:hep-ph/0512093},
year = {2008}
}
Comments
revtex, 10 pages, 8 eps figures; references added, version to appear in PRD