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

G. Agakishiev; D. Belver; A. Blanco; M. Böhmer; J. L. Boyard; P. Cabanelas; E. Castro; S. Chernenko; M. Destefanis; F. Dohrmann; A. Dybczak; E. Epple; L. Fabbietti; O. Fateev; P. Finocchiaro; P. Fonte; J. Friese; I. Fröhlich; T. Galatyuk; J. A. Garzón; R. Gernhäuser; C. Gilardi; M. Golubeva; D. González-Díaz; F. Guber; M. Gumberidze; T. Heinz; T. Hennino; R. Holzmann; I. Iori; A. Ivashkin; M. Jurkovic; B. Kämpfer; T. Karavicheva; I. Koenig; W. Koenig; B. W. Kolb; R. Kotte; A. Krása; F. Krizek; R. Krücken; H. Kuc; W. Kühn; A. Kugler; A. Kurepin; S. Lang; J. S. Lange; K. Lapidus; T. Liu; L. Lopes; M. Lorenz; L. Maier; A. Mangiarotti; J. Markert; V. Metag; B. Michalska; J. Michel; E. Morinière; J. Mousa; C. Müntz; L. Naumann; Y. C. Pachmayer; M. Palka; V. Pechenov; O. Pechenova; J. Pietraszko; W. Przygoda; B. Ramstein; L. Rehnisch; A. Reshetin; A. Rustamov; A. Sadovsky; P. Salabura; T. Scheib; A. Schmah; H. Schuldes; E. Schwab; J. Siebenson; Yu. G. Sobolev; S. Spataro; B. Spruck; H. Ströbele; J. Stroth; C. Sturm; A. Tarantola; K. Teilab; P. Tlusty; M. Traxler; R. Trebacz; H. Tsertos; V. Wagner; M. Weber; C. Wendisch; M. Wisniowski; J. Wüstenfeld; S. Yurevich; Y. Zanevsky

doi:10.1140/epja/i2013-13146-0

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A (2013) 49: 146
https://doi.org/10.1140/epja/i2013-13146-0

Regular Article - Experimental Physics

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

HADES Collaboration
G. Agakishiev⁷, D. Belver¹⁷, A. Blanco², M. Böhmer¹⁰, J. L. Boyard¹⁵, P. Cabanelas¹⁷, E. Castro¹⁷, S. Chernenko⁷, M. Destefanis¹¹, F. Dohrmann⁶, A. Dybczak³, E. Epple⁹, L. Fabbietti⁹, O. Fateev⁷, P. Finocchiaro¹, P. Fonte², J. Friese¹⁰, I. Fröhlich⁸, T. Galatyuk⁵, J. A. Garzón¹⁷, R. Gernhäuser¹⁰, C. Gilardi¹¹, M. Golubeva¹³, D. González-Díaz⁵, F. Guber¹³, M. Gumberidze⁵^,15, T. Heinz⁴, T. Hennino¹⁵, R. Holzmann⁴, I. Iori¹², A. Ivashkin¹³, M. Jurkovic¹⁰, B. Kämpfer⁶, T. Karavicheva¹³, I. Koenig⁴, W. Koenig⁴, B. W. Kolb⁴, R. Kotte⁶, A. Krása¹⁶, F. Krizek¹⁶, R. Krücken¹⁰, H. Kuc³^,15, W. Kühn¹¹, A. Kugler¹⁶, A. Kurepin¹³, S. Lang⁴, J. S. Lange¹¹, K. Lapidus⁹, T. Liu¹⁵, L. Lopes², M. Lorenz⁸, L. Maier¹⁰, A. Mangiarotti², J. Markert⁸, V. Metag¹¹, B. Michalska³, J. Michel⁸, E. Morinière¹⁵, J. Mousa¹⁴, C. Müntz⁸, L. Naumann⁶, Y. C. Pachmayer⁸, M. Palka³, V. Pechenov⁴, O. Pechenova⁸, J. Pietraszko⁴, W. Przygoda³, B. Ramstein¹⁵, L. Rehnisch⁸, A. Reshetin¹³, A. Rustamov⁸, A. Sadovsky¹³, P. Salabura³, T. Scheib⁸^*, A. Schmah¹, H. Schuldes⁸, E. Schwab⁴, J. Siebenson⁹, Yu. G. Sobolev¹⁶, S. Spataro¹, B. Spruck¹¹, H. Ströbele⁸, J. Stroth⁸^,4, C. Sturm⁴, A. Tarantola⁸, K. Teilab⁸, P. Tlusty¹⁶, M. Traxler⁴, R. Trebacz³, H. Tsertos¹⁴, V. Wagner¹⁶, M. Weber¹⁰, C. Wendisch⁶, M. Wisniowski³, J. Wüstenfeld⁶, S. Yurevich⁴ and Y. Zanevsky⁷

¹ Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, 95125, Catania, Italy
² LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516, Coimbra, Portugal
³ Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059, Kraków, Poland
⁴ GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
⁵ Technische Universität Darmstadt, 64289, Darmstadt, Germany
⁶ Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314, Dresden, Germany
⁷ Joint Institute of Nuclear Research, 141980, Dubna, Russia
⁸ Institut für Kernphysik, Goethe-Universität, 60438, Frankfurt, Germany
⁹ Excellence Cluster “Origin and Structure of the Universe”, 85748, Garching, Germany
¹⁰ Physik Department E12, Technische Universität München, 85748, Garching, Germany
¹¹ II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392, Giessen, Germany
¹² Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133, Milano, Italy
¹³ Institute for Nuclear Research, Russian Academy of Science, 117312, Moscow, Russia
¹⁴ Department of Physics, University of Cyprus, 1678, Nicosia, Cyprus
¹⁵ Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3, Université Paris Sud, F-91406, Orsay Cedex, France
¹⁶ Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068, Rez, Czech Republic
¹⁷ LabCAF. F. Física, Univ. de Santiago de Compostela, 15706, Santiago de Compostela, Spain

^* e-mail: t.scheib@gsi.de

Received: 9 September 2013
Accepted: 30 October 2013
Published online: 20 November 2013

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 on the 3 level is derived. Comparing this value with the number of successfully reconstructed hyperons allows to determine an upper limit on the ratio , which is confronted with statistical and coalescence-type model calculations.