Search for d∗ dibaryon by double-radiative capture on pionic deuterium
2002
Abstract We report a search for d ∗ dibaryon production by double-radiative capture on pionic deuterium. The experiment was conducted at the TRIUMF cyclotron using the RMC cylindrical pair spectrometer, and detected γ -ray coincidences following pion stops in liquid deuterium. We found no evidence for narrow dibaryons, and obtained a branching ratio upper limit, BR −6 (90% C.L.), for narrow d ∗ production in the mass range from 1920 to 1980 MeV.
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