/ Phenomenology-HEP hep-ph/0512312


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


Batusov, Yu.A. (Dubna, JINR) ; Blokhintseva, T.D. (Dubna, JINR) ; Balestra, F. (INFN, Turin) ; Bussa, M.P. (INFN, Turin) ; Piragino, G. (Enrico Fermi Ctr., Rome) ; Pontecorvo, G.B. (Enrico Fermi Ctr., Rome) ; Schepkin, M.G. (Moscow, ITEP)

Pages: 14

Abstract: The invariant mass spectra of the $pp\pi^-$ 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 $pp\pi^-$ 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 $NN\pi$ pseudoscalar resonance with T=0 called $d'$.

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 Запись создана 2010-10-28, последняя модификация 2014-01-30



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