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
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
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.
© SIF, Springer-Verlag Berlin Heidelberg, 2013