Akademska digitalna zbirka SLovenije - logo
E-viri
Celotno besedilo
Odprti dostop
  • Influence of N-resonances on hyperon production in the channel pp->K+ Lambda p at 2.95, 3.20 and 3.30 GeV/c beam momentum
    Collaboration, COSY-TOF; AbdEl-Samad, S; Abdel-Bary, M; Brinkmann, K; Clement, H; Dietrich, J; Dorochkevitch, E; Dshemuchadse, S; Ehrhardt, K; Erhardt, A; Eyrich, W; Fanara, C; Filges, D; Filippi, A; Freiesleben, H; Fritsch, M; Gast, W; Georgi, J; Gillitzer, A; Gottwald, J; Hauffe, J; Hesselbarth, D; Jaeger, H; Jakob, B; Jaekel, R; Karsch, L; Kilian, K; Koch, H; Krapp, M; Kress, J; Kuhlmann, E; Lehmann, A; Marcello, S; Marwinski, S; Mauro, S; Metzger, A; Meyer, W; Michel, P; Moeller, K; Moertel, H; Morsch, H P; Naumann, L; Paul, N; Pinna, L; Pizzolotto, C; Plettner, C; Reimann, S; Richter, M; Ritman, J; Roderburg, E; Schamlott, A; Schoenmeier, P; Schulte-Wissermann, M; Schroeder, W; Sefzick, T; Steinke, M; Stinzing, F; Sun, G; Teufel, A; Ullrich, W; Waechter, J; Wagner, G J; Wagner, M; Wenzel, R; Wilms, A; Wintz, P; Wirth, S; Wuestner, P; Zupranski, P

    arXiv.org, 03/2010
    Paper, Journal Article

    Hyperon production in the threshold region was studied in the reaction pp -> K+Lp using the time-of-flight spectrometer COSY-TOF. Exclusive data, covering the full phase-space, were taken at the three different beam momenta of p_beam=2.95, 3.20 and 3.30 GeV/c, corresponding to excess energies of epsilon=204, 285 and 316 MeV, respectively. Total cross-sections were deduced for the three beam momenta to be 23.9+/-0.8 +/-2.0 ub, 28.4+/-1.3 +/-2.2 ub and 35.0+/-1.3 +/-3.0 ub. Differential observables including Dalitz plots were obtained. The analysis of the Dalitz plots reveals a strong influence of the N(1650)-resonance at p_beam=2.95 GeV/c, whereas for the higher momenta an increasing relative contribution of the N(1710)- and/or of the N(1720)-resonance was observed. In addition, the pL-final-state interaction turned out to have a significant influence on the Dalitz plot distribution.

Vnos na polico