/ nucl-ex arXiv:1403.6662


Associate K^0 production in p+p collisions at 3.5 GeV: The role of Delta(1232)++


Agakishiev, G. (Dubna, JINR) ; Arnold, O. (Munich, Tech. U.) ; Balanda, A. (Jagiellonian U.) ; Belver, D. (Santiago de Compostela U.) ; Belyaev, A. (Dubna, JINR) ; Berger-Chen, J.C. (Munich, Tech. U.) ; Blanco, A. (LIP, Coimbra) ; Bohmer, M. (Munich, Tech. U.) ; Boyard, J.L. (Orsay) ; Cabanelas, P. (Santiago de Compostela U.) ; Chernenko, S. (Dubna, JINR) ; Dybczak, A. (Jagiellonian U.) ; Epple, E. (Munich, Tech. U.) ; Fabbietti, L. (Munich, Tech. U.) ; Fateev, O. (Dubna, JINR) ; Finocchiaro, P. (INFN, Catania) ; Fonte, P. (Coimbra Inst. Sup. Eng.) ; Friese, J. (Munich, Tech. U.) ; Frohlich, I. (Frankfurt U.) ; Galatyuk, T. (Darmstadt, EMMI) ; Garzon, J.A. (Santiago de Compostela U.) ; Gernhauser, R. (Munich, Tech. U.) ; Gobel, K. (Frankfurt U.) ; Golubeva, M. (Moscow, INR) ; Gonzalez-Diaz, D. (Darmstadt, Tech. Hochsch.) ; Guber, F. (Moscow, INR) ; Gumberidze, M. (Darmstadt, Tech. Hochsch.) ; Heinz, T. (Darmstadt, GSI) ; Hennino, T. (Orsay) ; Holzmann, R. (Darmstadt, GSI) ; Ierusalimov, A. (Dubna, JINR) ; Iori, I. (Milan U.) ; Ivashkin, A. (Moscow, INR) ; Jurkovic, M. (Munich, Tech. U.) ; Kampfer, B. (Dresden, Tech. U.) ; Karavicheva, T. (Moscow, INR) ; Koenig, I. (Darmstadt, GSI) ; Koenig, W. (Darmstadt, GSI) ; Kolb, B.W. (Darmstadt, GSI) ; Kornakov, G. (Darmstadt, Tech. Hochsch.) ; Kotte, R. (Forschungszentrum Dresden Rossendorf) ; Krasa, A. (Rez, Nucl. Phys. Inst.) ; Krizek, F. (Rez, Nucl. Phys. Inst.) ; Krucken, R. (Munich, Tech. U.) ; Kuc, H. (Orsay) ; Kuhn, W. (Giessen U.) ; Kugler, A. (Rez, Nucl. Phys. Inst.) ; Kunz, T. (Munich, Tech. U.) ; Kurepin, A. (Moscow, INR) ; Ladygin, V. (Dubna, JINR) ; Lalik, R. (COSM, Hampton) ; Lang, S. (Darmstadt, GSI) ; Lapidus, K. (Munich, Tech. U.) ; Lebedev, A. (Moscow, ITEP) ; Liu, T. (Orsay) ; Lopes, L. (LIP, Coimbra) ; Lorenz, M. (Frankfurt U.) ; Maier, L. (Munich, Tech. U.) ; Mangiarotti, A. (LIP, Coimbra) ; Markert, J. (Frankfurt U.) ; Metag, V. (Giessen U.) ; Michalska, B. (Jagiellonian U.) ; Michel, J. (Frankfurt U.) ; Munzer, R. (Munich, Tech. U.) ; Muntz, C. (Frankfurt U.) ; Naumann, L. (Forschungszentrum Dresden Rossendorf) ; Pachmayer, Y.C. (Frankfurt U.) ; Palka, M. (Jagiellonian U.) ; Parpottas, Y. (UC, Irvine) ; Pechenov, V. (Darmstadt, GSI) ; Pechenova, O. (Frankfurt U.) ; Pietraszko, J. (Darmstadt, GSI) ; Przygoda, W. (Jagiellonian U.) ; Ramstein, B. (Orsay) ; Reshetin, A. (Moscow, INR) ; Rustamov, A. (Frankfurt U.) ; Sadovsky, A. (Moscow, INR) ; Salabura, P. (Jagiellonian U.) ; Schmah, A. (LBL, Berkeley) ; Schwab, E. (Darmstadt, GSI) ; Siebenson, J. (Munich, Tech. U.) ; Sobolev, Yu. G. (Rez, Nucl. Phys. Inst.) ; Spataro, S. (INFN, Turin) ; Spruck, B. (Giessen U.) ; Strobele, H. (Frankfurt U.) ; Stroth, J. (Darmstadt, GSI) ; Sturm, C. (Darmstadt, GSI) ; Tarantola, A. (Frankfurt U.) ; Teilab, K. (Frankfurt U.) ; Tlusty, P. (Rez, Nucl. Phys. Inst.) ; Traxler, M. (Darmstadt, GSI) ; Trebacz, R. (Jagiellonian U.) ; Tsertos, H. (Cyprus U.) ; Vasiliev, T. (Dubna, JINR) ; Wagner, V. (Rez, Nucl. Phys. Inst.) ; Weber, M. (Munich, Tech. U.) ; Wendisch, C. (Dresden, Tech. U.) ; Wustenfeld, J. (Forschungszentrum Dresden Rossendorf) ; Yurevich, S. (Darmstadt, GSI) ; Zanevsky, Y. (Dubna, JINR)

Pages: 12

Abstract: An exclusive analysis of the 4-body final states $\mathrm{\Lambda + p + \pi^{+} + K^{0}}$ and $\mathrm{\Sigma^{0} + p + \pi^{+} + K^{0}}$ measured with HADES for p+p collisions at a beam kinetic energy of 3.5 GeV is presented. The analysis uses various phase space variables, such as missing mass and invariant mass distributions, in the four particle event selection (p, $\pi^+$, $\pi^+$, $\pi^-$) to find cross sections of the different production channels, contributions of the intermediate resonances $\mathrm{\Delta^{++}}$ and $\mathrm{\Sigma(1385)^{+}}$ and corresponding angular distributions. A dominant resonant production is seen, where the reaction $\mathrm{\Lambda + \Delta^{++} + K^{0}}$ has an about ten times higher cross section ($\mathrm{29.45\pm0.08^{+1.67}_{-1.46}\pm2.06\,\mu b}$) than the analogous non-resonant reaction ($\mathrm{2.57\pm0.02^{+0.21}_{-1.98}\pm0.18\,\mu b}$). A similar result is obtained in the corresponding $\Sigma^{0}$ channels with $\mathrm{9.26\pm0.05^{+1.41}_{-0.31}\pm0.65\,\ mu b}$ in the resonant and $\mathrm{1.35\pm0.02^{+0.10}_{-1.35}\pm0.09\,\mu b}$ in the non-resonant reactions.

Web-Page: http://inspirehep.net/record/1287382/files/Chi2_Minim_DPP_Angle_LS_V3.png; http://inspirehep.net/record/1287382/files/CosThetacmDPPL.png; http://inspirehep.net/record/1287382/files/CosThetacmDPPL_Corr_SysIVar.png; http://inspirehep.net/record/1287382/files/CosThetacmDPPS.png; http://inspirehep.net/record/1287382/files/CosThetacmDPPS_Corr_SysIVar.png; http://inspirehep.net/record/1287382/files/IML.png; http://inspirehep.net/record/1287382/files/IMS.png; http://inspirehep.net/record/1287382/files/InvMassK0S_Sideband_zoom.png; http://inspirehep.net/record/1287382/files/K0sBackground_Mom_Sideband.png; http://inspirehep.net/record/1287382/files/K0sBackground_PTh_Sideband.png; http://inspirehep.net/record/1287382/files/LegendrePolynoms.png; http://inspirehep.net/record/1287382/files/MMABCD_cutBands.png; http://inspirehep.net/record/1287382/files/MMABCD_hhcutMMABD.png; http://inspirehep.net/record/1287382/files/MMABD.png; http://inspirehep.net/record/1287382/files/arXiv:1403.6662.pdf


Note: *Temporary entry*; 12 pages, 11 figures

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