Search for aT=2Dibaryon

We have made a good-resolution, high-sensitivity search for a $T=2\mathrm{}$ dibaryon in the missing-mass spectra for the reaction $d({\pi }^{-}, {\pi }^{+}){\pi }^{-}\mathrm{nn}$ at 292 MeV. Our results are consistent with there being no resonance peak due to such a state in the mass region 2001-2070 MeV. 95%-confidence upper limits for the integrated cross sections for such a state are presented. It is found that a quasifree model calculation, without final-state interactions, considerably underpredicts the continuum yield in the vicinity of the threshold.