The hadronic annihilation branching-ratios in quasi-two-body final states have been obtained from the observation of the reactions pbarp→π+π−π0, K+K−π0,KπK0 at rest in hydrogen targets at different densities. The enhancement or suppression of specific hadronic channels connected to dynamical selection rules is observed in the production of different resonances both in protonium S and P–waves, systematically investigated for the first time. Besides the well known ρ(770)π and a2(1320)π enhancement from 3S1 and 1S0 partial waves, the dominance of one isospin source in K*(892)Kbar production, well established from S–waves, is confirmed also in P–waves (1S0, I = 0; 3S1, I = 1; 1P1, I = 0; 3P1, I = 0; 3P2, I = 1). In addition, the experimental data clearly show a strong suppression of φ(1020)π and a0(980)π final states from P–wave which has a remarkable coincidence with K*(892)Kbar pattern production.

Dynamical selection rules from pbar p annihilation at rest in three meson final states

BARGIOTTI, MARIANNE;BERTIN, ANTONIO;CAPPONI, MARCO;CARBONE, ANGELO;DE CASTRO, STEFANO;DONA', ROBERTO;FABBRI, LAURA;FACCIOLI, PIETRO;GALLI, DOMENICO;GRIMALDI, FILIPPO;MASSA, IGNAZIO GIACOMO;PICCININI, MAURIZIO;SEMPRINI CESARI, NICOLA;VILLA, MAURO;VITALE, ANTONIO;ZOCCOLI, ANTONIO;
2004

Abstract

The hadronic annihilation branching-ratios in quasi-two-body final states have been obtained from the observation of the reactions pbarp→π+π−π0, K+K−π0,KπK0 at rest in hydrogen targets at different densities. The enhancement or suppression of specific hadronic channels connected to dynamical selection rules is observed in the production of different resonances both in protonium S and P–waves, systematically investigated for the first time. Besides the well known ρ(770)π and a2(1320)π enhancement from 3S1 and 1S0 partial waves, the dominance of one isospin source in K*(892)Kbar production, well established from S–waves, is confirmed also in P–waves (1S0, I = 0; 3S1, I = 1; 1P1, I = 0; 3P1, I = 0; 3P2, I = 1). In addition, the experimental data clearly show a strong suppression of φ(1020)π and a0(980)π final states from P–wave which has a remarkable coincidence with K*(892)Kbar pattern production.
M. BARGIOTTI; A. BERTIN; M. BRUSCHI; M. CAPPONI; A. CARBONE; S. DE CASTRO; R. DONÀ; L. FABBRI; P. FACCIOLI; D. GALLI; B. GIACOBBE; F. GRIMALDI; U. MARCONI; I. MASSA; M. PICCININI; N. SEMPRINI CESARI; R. SPIGHI; S. VECCHI; M. VILLA; A. VITALE; A. ZOCCOLI; M. POLI; A. BIANCONI; M.P. BUSSA; M. CORRADINI; A. DONZELLA; E. LODI RIZZINI; L. VENTURELLI; C. CICALÒ; A. DE FALCO; A. MASONI; G. PUDDU; S. SERCI; G. USAI; O.E. GORCHAKOV; S.N. PRAKHOV; A.M. ROZHDESTVENSKY; M.G. SAPOZHNIKOV; V.I. TRETYAK; P. GIANOTTI; C. GUARALDO; A. LANARO; V. LUCHERINI; C. PETRASCU; R. A. RICCI; V. FILIPPINI; A. FONTANA; P. MONTAGNA; A. PANZARASA; A. ROTONDI; P. SALVINI; A. ZENONI; F. BALESTRA; L. BUSSO; P. CERELLO; O. DENISOV; L. FERRERO; R. GARFAGNINI; A. MAGGIORA; D. PANZIERI; F. TOSELLO; E. BOTTA; T. BRESSANI; D. CALVO; F. DE MORI; A. FELICIELLO; A. FILIPPI; N. MIRFAKHRAI; S. MARCELLO; M. AGNELLO; F. IAZZI
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/1555
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