The first results on the omega-pi-0 system produced in the charge-exchange reaction of pi--p scattering at 38 GeV/c and 100 GeV/c are presented. The omega-pi-0 mass spectrum shows, alongside with the well-known b1(0) (1235) and rho-3(0) (1690) mesons, a new neutral state with mass 2200 +/- 20 MeV and width 260 +/- 50 MeV. This meson, X(2200), is produced like rho-3 through one-pion exchange. X(2200) is a candidate for the 1-- multiplet, and its possible interpretation is a 2(3)D1 excitation of the rho-0. Its production cross section at 3 S GeV/c is equal to sigma(pi--p --> Xn) . BR (X --> omega-pi-0) = 120 +/- 25 nb. Cross sections for b1 and rho-3 have also been measured. The energy dependences have been determined.

GAMS RESULTS ON THE OMEGA-PI(0) SYSTEM

MASSAI, MARCO MARIA;
1992

Abstract

The first results on the omega-pi-0 system produced in the charge-exchange reaction of pi--p scattering at 38 GeV/c and 100 GeV/c are presented. The omega-pi-0 mass spectrum shows, alongside with the well-known b1(0) (1235) and rho-3(0) (1690) mesons, a new neutral state with mass 2200 +/- 20 MeV and width 260 +/- 50 MeV. This meson, X(2200), is produced like rho-3 through one-pion exchange. X(2200) is a candidate for the 1-- multiplet, and its possible interpretation is a 2(3)D1 excitation of the rho-0. Its production cross section at 3 S GeV/c is equal to sigma(pi--p --> Xn) . BR (X --> omega-pi-0) = 120 +/- 25 nb. Cross sections for b1 and rho-3 have also been measured. The energy dependences have been determined.
Landsberg, Gl; Dowskow, Sv; Inyakin, Av; Kachanov, Va; Kulik, Av; Landsberg, Gl; Lednev, Aa; Polovnikov, Sa; Prokoshkin, Yd; Sadovsky, Sa; Samoylenko, Vd; Shagin, Pm; Shtannikov, Av; Singovsky, Av; Sugonyaev, Vp; Chikovani, Eg; Tabidze, Md; Bricman, C; Stroot, Jp; Binon, Fg; Bencheikh, B; Gouanere, M; Peigneux, Jp; Poulet, M; Alde, D; Knapp, Ea; Boutemeur, M; Bellazzinni, R; Brez, A; Massai, MARCO MARIA; Torquati, Mr; Inaba, S; Kobayashi, M; Takamatsu, K; Tsuru, T; Nakamura, T.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/20282
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