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Search for d∗ dibaryon by double-radiative capture on pionic deuterium

Żołnierczuk, P.A
Gorringe, T.P
Hasinoff, M.D
Kovash, M.A
Tripathi, S
Wright, D.H

Publication date

December 2002

DOI

10.1016/S0370-2693(02)02932-5

Publisher

Elsevier Science B.V.

Abstract

AbstractWe 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<6.7×10−6 (90% C.L.), for narrow d∗ production in the mass range from 1920 to 1980 MeV

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