We have performed a search for the P-1(1) state of charmonium resonantly formed in ppBAR annihilations, close to the center of gravity of the 3P(J) states. We report results from the study of the J/psi+pi0 and J/psi+2pi final states. We have observed a statistically significant enhancement in the pBAR+p-->J/psi+pi0 cross section at square-root s congruent-to 3526.2 MeV. This enhancement has the characteristics of a narrow resonance of mass, total width, and production cross section consistent with what is expected for the P-1(1) state. In our search we have found no candidates for the reactions pBAR+p-->J/psi+pi0+pi0 and pBAR+p-->J/psi+pi++pi-

OBSERVATION OF THE (1)P(1) STATE OF CHARMONIUM

CALABRESE, Roberto;LUPPI, Eleonora;PETRUCCI, Ferruccio Carlo;SAVRIE', Mauro;
1992

Abstract

We have performed a search for the P-1(1) state of charmonium resonantly formed in ppBAR annihilations, close to the center of gravity of the 3P(J) states. We report results from the study of the J/psi+pi0 and J/psi+2pi final states. We have observed a statistically significant enhancement in the pBAR+p-->J/psi+pi0 cross section at square-root s congruent-to 3526.2 MeV. This enhancement has the characteristics of a narrow resonance of mass, total width, and production cross section consistent with what is expected for the P-1(1) state. In our search we have found no candidates for the reactions pBAR+p-->J/psi+pi0+pi0 and pBAR+p-->J/psi+pi++pi-
1992
Armstrong, Ta; Bettoni, D; Bharadwaj, V; Biino, C; Borreani, G; Broemmelsiek, D; Buzzo, A; Calabrese, Roberto; Ceccucci, A; Cester, R; Church, M; Dalpiaz, P; P., FERRETTI DALPIAZ; Dibenedetto, R; Dimitroyannis, D; Fabbri, Mg; Fast, J; Gianoli, A; Ginsburg, Cm; Gollwitzer, K; Hahn, A; Hasan, M; Hsueh, S; Lewis, R; Luppi, Eleonora; Macri, M; Majewska, Am; Mandelkern, M; Marchetto, F; Marinelli, M; Marques, J; Marsh, W; Martini, M; Masuzawa, M; Menichetti, E; Migliori, A; Mussa, R; Palestini, S; Pallavicini, M; Pastrone, N; Patrignani, C; Peoples, J; Pesando, L; Petrucci, Ferruccio Carlo; Pia, Mg; Pordes, S; Rapidis, P; Ray, R; Reid, J; Rinaudo, G; Roccuzzo, B; Rosen, J; Santroni, A; Sarmiento, M; Savrie', Mauro; Scalisi, A; Schultz, J; Seth, Kk; Smith, A; Smith, Ga; Sozzi, M; Trokenheim, S; Weber, Mf; Werkema, S; Zhang, Y; Zhao, J; Zioulas, G.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/516711
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