Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1999-03-20
Phys.Rev.Lett.83:2128-2132,1999
Physics
High Energy Physics
High Energy Physics - Experiment
15 pages, 7 figures
Scientific paper
10.1103/PhysRevLett.83.2128
We report on two null searches, one for the spontaneous appearance of $\pi^+\pi^-$ pairs, another for a single $\pi^0$, consistent with the decay of a long-lived neutral particle into hadrons and an unseen neutral particle. For the lowest level gluon-gluino bound state, known as the $R^0$, we exclude the decays $R^0\to \pi^+\pi^-\tilde{\gamma}$ and $R^0\to \pi^0\tilde{\gamma}$ for the masses of $R^0$ and $\tilde{\gamma}$ in the theoretically allowed range. In the most interesting $R^0$ mass range, $\leq 3 GeV/c^2$, we exclude $R^0$ lifetimes from $3\times 10^{-10}$ seconds to as high as $10^{-3}$ seconds, assuming perturbative QCD production for the $R^0$.
al Alavi-Harati A. et.
KTeV Collaboration
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