https://doi.org/10.1140/epjc/s10052-007-0436-y
Regular Article - Experimental Physics
Production of V0 pairs in the hyperon experiment WA89
1
Moscow Lebedev Physics Institute, Leninsky pr. 53, 117924, Moscow, Russia
2
Sezione di Genova, Dipartimento di Fisica and I.N.F.N, 16146, Genova, Italy
3
Max-Planck-Institut für Kernphysik Heidelberg, 69029, Heidelberg, Germany
4
Institut des Sciences Nucléaires, Université de Grenoble, 38026, Grenoble Cedex, France
5
CERN, 1211, Genève 23, Switzerland
6
Physikalisches Institut, Universität Heidelberg, 69120, Heidelberg, Germany
7
Departamento de Física y Centro de Estudios Subatómicos, Universidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, Chile
8
Institut für Kernphysik, Universität Mainz, 55099, Mainz, Germany
9
University of Bristol, Bristol, BS8 1TL, UK
10
TRIUMF, Vancouver, B.C., Canada V6T 2A3,
11
Thomas Jefferson Lab, Newport News, VA, 23606, USA
12
Instituto de Fisica, Universidad Autonoma de San Luis Potosi,, S.L.P., 78240, Mexico
13
Fraunhofer Institut für Solar Energiesysteme, 79100, Freiburg, Germany
14
Physik Department E18, Technische Universitaät München, 85747, Garching, Germany
15
Fakultät für Physik, Universität Freiburg, Freiburg, Germany
16
Department of Physics, University of Utah, Salt Lake City, Utah, USA
17
Gesellschaft für Schwerionenforschung, 64291, Darmstadt, Germany
18
University of Iowa, Iowa City, Iowa, 52242, USA
19
CERN, 1211, Genève 23, Switzerland
20
Department of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
21
NIKHEF, 1009 D8, Amsterdam, The Netherlands
* e-mail: Mikhail.Zavertiaev@mpi-hd.mpg.de
Received:
9
September
2007
Revised:
25
September
2007
Published online:
17
October
2007
We present a comprehensive study of the inclusive production of V0V0 pairs (V0=Λ, Λ̄ or KS ) by Σ- and π- of 340 GeV/c momentum and neutrons of 260 GeV/c mean momentum in copper and carbon targets. In particular, the dependence of the xF spectra on the combination of beam-particle and produced V0V0 pair is investigated and compared to predictions obtained from PYTHIA and QSGM calculations. The data and these predictions differ in many details, the agreement can at best be termed as qualitative. A signal from decays of the tensor meson f’2(1525) was observed in the KS KS mass distribution and inclusive production cross sections were measured. No signal was found from the double-strange H-dibaryon decaying to ΛΛ.
© Springer-Verlag / Società Italiana di Fisica, 2007