/ nucl-ex arXiv:1310.6198


An upper limit on hypertriton production in collisions of Ar(1.76 AGeV)+KCl


Agakishiev, G. (Dubna, JINR) ; Belver, D. (Santiago de Compostela U.) ; Blanco, A. (LIP, Coimbra) ; Bohmer, M. (Munich, Tech. U.) ; Boyard, J.L. (Orsay, IPN) ; Cabanelas, P. (Santiago de Compostela U.) ; Castro, E. (Santiago de Compostela U.) ; Chernenko, S. (Dubna, JINR) ; Destefanis, M. (Giessen U.) ; Dohrmann, F. (Forschungszentrum Dresden Rossendorf) ; Dybczak, A. (Jagiellonian U.) ; Epple, E. (COSM, Hampton) ; Fabbietti, L. (COSM, Hampton) ; 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.) ; Gilardi, C. (Giessen U.) ; Golubeva, M. (Moscow, INR) ; Gonzalez-Diaz, D. (Darmstadt, Tech. Hochsch.) ; Guber, F. (Moscow, INR) ; Gumberidze, M. (Orsay, IPN) ; Heinz, T. (Darmstadt, GSI) ; Hennino, T. (Orsay, IPN) ; Holzmann, R. (Darmstadt, GSI) ; 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) ; 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, IPN) ; Kuhn, W. (Giessen U.) ; Kugler, A. (Rez, Nucl. Phys. Inst.) ; Kurepin, A. (Moscow, INR) ; Lang, S. (Darmstadt, GSI) ; Lange, J.S. (Giessen U.) ; Lapidus, K. (COSM, Hampton) ; Liu, T. (Orsay, IPN) ; Lopes, L. (LIP, Coimbra) ; Lorenz, M. (Darmstadt, EMMI) ; 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.) ; Moriniere, E. (Orsay, IPN) ; Mousa, J. (Cyprus U.) ; Muntz, C. (Frankfurt U.) ; Naumann, L. (Forschungszentrum Dresden Rossendorf) ; Pachmayer, Y.C. (Frankfurt U.) ; Palka, M. (Jagiellonian U.) ; Pechenov, V. (Darmstadt, GSI) ; Pechenova, O. (Frankfurt U.) ; Pietraszko, J. (Darmstadt, GSI) ; Przygoda, W. (Jagiellonian U.) ; Ramstein, B. (Orsay, IPN) ; Rehnisch, L. (Frankfurt U.) ; Reshetin, A. (Moscow, INR) ; Rustamov, A. (Frankfurt U.) ; Sadovsky, A. (Moscow, INR) ; Salabura, P. (Jagiellonian U.) ; Scheib, T. (Frankfurt U.) ; Schmah, A. (LBL, Berkeley) ; Schuldes, H. (Frankfurt U.) ; Schwab, E. (Darmstadt, GSI) ; Siebenson, J. (COSM, Hampton) ; 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.) ; Wagner, V. (Rez, Nucl. Phys. Inst.) ; Weber, M. (Munich, Tech. U.) ; Wendisch, C. (Dresden, Tech. U.) ; Wisniowski, M. (Jagiellonian U.) ; Wustenfeld, J. (Forschungszentrum Dresden Rossendorf) ; Yurevich, S. (Darmstadt, GSI) ; Zanevsky, Y. (Dubna, JINR)

Abstract: A high-statistic data sample of Ar(1.76 AGeV)+KCl events recorded with HADES is used to search for a hypertriton signal. An upper production limit per centrality-triggered event of 1.04 x $10^{-3}$ on the $3\sigma$ level is derived. Comparing this value with the number of successfully reconstructed $\Lambda$ hyperons allows to determine an upper limit on the ratio $N_{_{\Lambda}^3H}/N_{\Lambda}$, which is confronted with statistical and coalescence-type model calculations.

Web-Page: http://inspirehep.net/record/1261886/files/invMass_sub_data.png; http://inspirehep.net/record/1261886/files/invmass_data_all.png; http://inspirehep.net/record/1261886/files/invmass_with_hyp_225_3sigma_2sigmaInt.png; http://inspirehep.net/record/1261886/files/mass_helium_reloaded.png; http://inspirehep.net/record/1261886/files/arXiv:1310.6198.pdf


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