Author/Authors :
OBELIX Collaboration، نويسنده , , P. Montagna، نويسنده , , G. Bendiscioli، نويسنده , , V. Filippini، نويسنده , , A. Fontana، نويسنده , , A. Rotondi، نويسنده , , P. SALVINI، نويسنده , , A. Panzarasa، نويسنده , , M. Bargiotti، نويسنده , , A. Bertin، نويسنده , , M. Bruschi، نويسنده , , M. Capponi، نويسنده , , S. De Castro، نويسنده , , Elizabeth L. Fabbri، نويسنده , , P. Faccioli، نويسنده , , D. Galli، نويسنده , , B. Giacobbe، نويسنده , , U. Marconi، نويسنده , , M. Piccinini، نويسنده , , N. Semprini-Cesari، نويسنده , , et al.، نويسنده ,
Abstract :
The View the MathML source annihilation at rest in a NTP 4He-gas target has been studied by means of the Obelix spectrometer installed at the LEAR accelerator of CERN. Reactions with production of 2π−2π+, 2π−3π+, 2π−2π+p, 2π−π+2p, 2π−3p (with pπ>80 MeV/c and pp>300 MeV/c) have been selected and single- and multinucleon annihilations identified. For the first time some known mesonic and baryonic resonances have been observed in View the MathML source4He annihilations and branching ratios are evaluated for a number of reaction channels.
Keywords :
Pontecorvo reactions , branching ratios , Nuclear reactions , 4HeView the MathML source , E at 105 MeV/c , fragment invariant mass , momentum distributions , deduced , mesonic and baryonic resonances , Measured
