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Search for d^* Dibaryon by Double-radiative Capture on Pionic Deuterium

P. A. Zolnierczuk·T. P. Gorringe·M. D. Hasinoff·M. A. Kovash·S. Tripathi·D. H. Wright
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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 gamma-ray coincidences following pion stops in liquid deuterium. We found no evidence for narrow dibaryons, and obtained a branching ratio upper limit, BR < 6.7 times 10^{-6} (90% C.L.), for narrow d^* production in the mass range from 1920 to 1980 MeV. Replaced with Physics Letter B accepted version and corrected normalization.

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P. A. Zolnierczuk, T. P. Gorringe, M. D. Hasinoff, M. A. Kovash, S. Tripathi, D. H. Wright. 2002-11-20. Search for d^* Dibaryon by Double-radiative Capture on Pionic Deuterium. https://doi.org/10.1016/s0370-2693(02)02932-5

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