We report on a study of the angular distribution in the reaction ppBAR --> chi(c2) --> J/psi gamma --> e+e-gamma. Using a sample of 1904 events, we find that the contribution of helicity zero in the formation process is B-0(2) < 0.22 (90% C.L.), and that the normalized quadrupole amplitude in the radiative decay is a2 = -0.14 +/- 0.06. The normalized radiative decay octupole amplitude a3 is found to be consistent with zero.

STUDY OF THE ANGULAR-DISTRIBUTION OF THE REACTION (P)OVER-BARP-]CHI-C2-]J/PSI-GAMMA-]E+E-GAMMA RID C-5223-2009

SOZZI, MARCO STANISLAO;
1993-01-01

Abstract

We report on a study of the angular distribution in the reaction ppBAR --> chi(c2) --> J/psi gamma --> e+e-gamma. Using a sample of 1904 events, we find that the contribution of helicity zero in the formation process is B-0(2) < 0.22 (90% C.L.), and that the normalized quadrupole amplitude in the radiative decay is a2 = -0.14 +/- 0.06. The normalized radiative decay octupole amplitude a3 is found to be consistent with zero.
1993
Armstrong, Ta; Bettoni, D; Bharadwaj, V; Biino, C; Borreani, G; Broemmelsiek, D; Buzzo, A; Calabrese, R; Ceccucci, A; Cester, R; Church, Md; Dalpiaz, P; Dalpiaz, Pf; Dibenedetto, R; Dimitroyannis, D; Fabbri, Mg; Fast, Je; Gianoli, A; Ginsburg, Cm; Gollwitzer, Ke; Hahn, Aa; Hasan, Ma; Hsueh, Sy; Lewis, Ra; Luppi, E; Macri, M; Majewska, Am; Mandelkern, Ma; Marchetto, F; Marinelli, M; Marques, Jl; 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, F; Pia, Mg; Pordes, S; Rapidis, Pa; Ray, Re; Reid, Jd; Rinaudo, G; Roccuzzo, B; Rosen, Jl; Santroni, A; Sarmiento, M; Savrie, M; Scalisi, A; Schultz, J; Seth, Kk; Smith, A; Smith, Ga; Sozzi, MARCO STANISLAO; Trokenheim, S; Weber, Mf; Werkema, Sj; Zhang, Y; Zhao, Jl; Zioulas, G.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/23018
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