Study of the isovector scalar mesons in the channel p?p at three hydrogen target densities

A BERTIN,A BENEDETTINI, M BRUSCHI, M CAPPONI,A COLLAMATI,I DANTONE, S DECASTRO,R DONA, A FERRETTI,D GALLI

Nuclear Physics B - Proceedings Supplements（1997）

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Abstract

The study of the I = 1,0(++) states with the OBELIX detector in the channel <(p)over bar p> --> (K+/-KS0) pi(-/+) at three different target densities is reported. We discuss in particular the results about a(0)(980) and the evidence of an extra scalar state with mass 1.29 +/- 0.01 GeV/c(2) and width 0.080 +/- 0.005 GeV/c(2).

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