The first results are presented on the study of the omega-pi-0 system produced in the charge-exchange reaction of pi-p scattering at the momenta 38 and 100 GeV/c. Together with the well known b1(0) (1235) and rho-3 (1690) mesons, in the mass spectrum of the omega-pi-0 system one observes a new neutral state with mass 2200 +/- 20 MeV and width 260 +/- 50 MeV, produced, like the rho-3, via one-pion exchange. This meson, X(2200), is a candidate for the 1- -multiplet. A possible interpretation is that it is a 2(3)D1 radial excitation of the rho-0 meson. Its production cross section at 38 GeV/c is sigma[pi-p --> X(2200)n]BR[X(2200) --> omega-pi-0] = 120 +/- 25 nb, and it falls off quadratically with increasing energy, which is consistent with one-pion exchange.

STUDY OF THE OMEGA-PI(0) SYSTEM AT HIGH MASSES

MASSAI, MARCO MARIA;
1992

Abstract

The first results are presented on the study of the omega-pi-0 system produced in the charge-exchange reaction of pi-p scattering at the momenta 38 and 100 GeV/c. Together with the well known b1(0) (1235) and rho-3 (1690) mesons, in the mass spectrum of the omega-pi-0 system one observes a new neutral state with mass 2200 +/- 20 MeV and width 260 +/- 50 MeV, produced, like the rho-3, via one-pion exchange. This meson, X(2200), is a candidate for the 1- -multiplet. A possible interpretation is that it is a 2(3)D1 radial excitation of the rho-0 meson. Its production cross section at 38 GeV/c is sigma[pi-p --> X(2200)n]BR[X(2200) --> omega-pi-0] = 120 +/- 25 nb, and it falls off quadratically with increasing energy, which is consistent with one-pion exchange.
Alde, D; Bellazzini, R; Bencheikh, B; Binon, Fg; Boutemeur, M; Brez, A; Bricman, C; Chikovani, Eg; Donskov, Sv; Gouanere, M; Inaba, S; Inyakin, Av; Kachanov, Va; Khaustov, Gv; Knapp, Ea; Kobayashi, M; Kulik, Av; Landsberg, Gl; Lednev, Aa; Massai, MARCO MARIA; Nakamura, T; Peigneux, Jp; Polovnikov, Sa; Poulet, M; Prokoshkin, Yd; Sadovskii, Sa; Samoilenko, Vd; Shagin, Pm; Shtannikov, Av; Singovskii, Av; Stroot, Jp; Sugonyaev, Vp; Tabidze, Md; Takamatsu, K; Torquati, Mr; Tsuru, T.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/20784
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