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Resonant behaviour in double charge exchange reaction of π^+ mesons on the nuclear photoemulsion

Yu. A. Batusov·T. D. Blokhintseva·F. Balestra·M. P. Bussa·G. Piragino·G. B. Pontecorvo·M. G. Schepkin
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Abstract

The invariant mass spectra of the $ppπ^-$ and $pp$ systems produced in the double charge exchange (DCX) of positively charged pions on photoemulsion are analysed. A pronounced peak is observed in the $ppπ^-$ invariant mass spectrum, while the $M_{pp}$ spectrum exhibits a strong Migdal-Watson effect of the proton-proton final state interaction. These findings are in favor of the $NN$-decoupled $NNπ$ pseudoscalar resonance with T=0 called $d'$.

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Yu. A. Batusov, T. D. Blokhintseva, F. Balestra, M. P. Bussa, G. Piragino, G. B. Pontecorvo, M. G. Schepkin. 2006-04-20. Resonant behaviour in double charge exchange reaction of π^+ mesons on the nuclear photoemulsion. https://doi.org/10.1140/epja%2Fi2006-10010-4

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