Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-12-08
Phys.Rev.D73:075010,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
revtex, 10 pages, 8 eps figures; references added, version to appear in PRD
Scientific paper
10.1103/PhysRevD.73.075010
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.
Hagiwara Kaoru
Mawatari Kentarou
Rainwater David
Stelzer Tim
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