在$π^-P $碰撞与黑德的第二个共振区域的两杆子生产

论文标题

在$π^-P $碰撞与黑德的第二个共振区域的两杆子生产

Two-Pion production in the second resonance region in $π^- p$ collisions with HADES

论文作者

Adamczewski-Musch, J., Arnold, O., Atomssa, E. T., Behnke, C., Belounnas, A., Belyaev, A., Berger-Chen, J. C., Biernat, J., Blanco, A., Blume, C., Böhmer, M., Chernenko, S., Chlad, L., Chudoba, P., Ciepał, I., Deveaux, C., Dittert, D., Dreyer, J., Epple, E., Fabbietti, L., Fateev, O., Fonte, P., Franco, C., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Golubeva, M., Greifenhagen, R., Guber, F., Gumberidze, M., Harabasz, S., Heinz, T., Hennino, T., Höhne, C., Holzmann, R., Ierusalimov, A., Ivashkin, A., Kämpfer, B., Kardan, B., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kornas, F., Kotte, R., Kuboś, J., Kugler, A., Kunz, T., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lapidus, K., Lebedev, A., Linev, S., Lopes, L., Lorenz, M., Mahmoud, T., Maier, L., Malige, A., Markert, J., Maurus, S., Metag, V., Michel, J., Mihaylov, D. M., Mikhaylov, V., Morozov, S., Müntz, C., Münzer, R., Naumann, L., Nowakowski, K., Parpottas, Y., Pechenov, V., Pechenova, O., Petukhov, O., Pietraszko, J., Prozorov, A. P., Przygoda, W., Ramstein, B., Rathod, N., Reshetin, A., Rodriguez-Ramos, P., Rost, A., Sadovsky, A., Salabura, P., Scheib, T., Schmidt-Sommerfeld, K., Schuldes, H., Schwab, E., Scozzi, F., Seck, F., Sellheim, P., Siebenson, J., Silva, L., Sing, U., Smyrski, J., Spataro, S., Spies, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Szala, M., Tlusty, P., Traxler, M., Tsertos, H., Ungethüm, C., Vazquez-Doce, O., Wagner, V., Wendisch, C., Wiebusch, M. G., Wirth, J., Wójcik, D., Zanevsky, Y., Zumbruch, P.

论文摘要

Pion诱导的反应为通过部分波分析的明确描述了对男性共振及其耦合通道的独特机会。使用SIS18处的次级锥形光束，已经研究了第二个共振区域中的两个Pion产生，以揭示$ n（1520）\ frac {3} {3} {2}^ - $ $ $ $ $ $ $ρ$生产中的作用。在独家频道上具有一个pion（$π^{ - } p $）和两个（$π^{+}π^{ - } n $，$π^{0}π^{0}π^{ - } p $）在$π^{ - } - p $反应中在四个不同的pion beam tema and 0.655，0.65，0.683，0。 GEV/c）提出。使用BONN-GATCHINA PARTAIL WAVE分析获得了不同部分波和$Δπ$，$Nσ$和$Nρ$ ISOBAR配置的激发函数。发现$ n（1520）\ frac {3} {2}^ - $共振在分支比率$ br = 12.2 \ pm 1.9 \％$的$nρ$最终状态中占主导地位。

Pion induced reactions provide unique opportunities for an unambiguous description of baryonic resonances and their coupling channels by means of a partial wave analysis. Using the secondary pion beam at SIS18, the two pion production in the second resonance region has been investigated to unravel the role of the $N(1520) \frac{3}{2}^-$ resonance in the intermediate $ρ$ production. Results on exclusive channels with one pion ($π^{-}p$) and two pions ($π^{+}π^{-}n$, $π^{0}π^{-}p$) in the final state measured in the $π^{-}-p$ reaction at four different pion beam momenta (0.650, 0.685, 0.733, and 0.786 GeV/c) are presented. The excitation function of the different partial waves and $Δπ$, $Nσ$ and $Nρ$ isobar configurations is obtained, using the Bonn-Gatchina partial wave analysis. The $N(1520) \frac{3}{2}^-$ resonance is found to dominate the $Nρ$ final state with the branching ratio $BR=12.2 \pm 1.9\%$.

下载PDF全文

下载文献需遵守相关版权规定

论文标题