Is isospin I=2 assignment preferable for d₁^*(1956) resonance candidate seen in reaction pp-> 2 gamma X below pion threshold ?
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pionbelowcollaborationgammaisospinreactionresonancethreshold
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We compare the virtues of two options for the isospin (I=1 or 2) of the apparently exotic dibarion resonance d_1^*(1956), as it is noticed by the DIB2gamma Collaboration (JINR) in the reaction pp -> 2 gamma X below the pion threshold, and using recent results following from the RMC Collaboration (TRIUMF) measurement of the relative probability of the double-photon pion capture in the pi-mesic deuterium atoms.
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