Production of V0 pairs in the hyperon experiment WA89

M.I. Adamovich; Yu.A. Alexandrov; S.P. Baranov; D. Barberis; M. Beck; C. Bérat; W. Beusch; M. Boss; S. Brons; W. Brückner; M. Buénerd; C. Busch; C. Büscher; F. Charignon; J. Chauvin; E.A. Chudakov; U. Dersch; F. Dropmann; J. Engelfried; F. Faller; A. Fournier; S.G. Gerassimov; M. Godbersen; P. Grafström; T. Haller; M. Heidrich; E. Hubbard; R.B. Hurst; K. Königsmann; I. Konorov; S. Kovalenko; N. Keller; K. Martens; P. Martin; S. Masciocchi; R. Michaels; U. Müller; H. Neeb; D. Newbold; C. Newsom; S. Paul; J. Pochodzalla; I. Potashnikova; B. Povh; Z. Ren; M. Rey-Campagnolle; G. Rosner; L. Rossi; H. Rudolph; C. Scheel; L. Schmitt; H.-W. Siebert; A. Simon; V. Smith; O. Thilmann; A. Trombini; E. Vesin; B. Volkemer; K. Vorwalter; T. Walcher; G. Wälder; R. Werding; E. Wittmann; M.V. Zavertyaev

doi:10.1140/epjc/s10052-007-0436-y

2022 Impact factor 4.4

Particles and Fields

Eur. Phys. J. C (2007) 52: 857-874
https://doi.org/10.1140/epjc/s10052-007-0436-y

Regular Article - Experimental Physics

Production of V⁰ pairs in the hyperon experiment WA89

M.I. Adamovich¹, Yu.A. Alexandrov¹, S.P. Baranov¹, D. Barberis², M. Beck³, C. Bérat⁴, W. Beusch⁵, M. Boss⁶, S. Brons³^,10, W. Brückner³, M. Buénerd⁴, C. Busch⁶, C. Büscher³, F. Charignon⁴, J. Chauvin⁴, E.A. Chudakov⁶^,11, U. Dersch³, F. Dropmann³, J. Engelfried⁶^,12, F. Faller⁶^,13, A. Fournier⁴, S.G. Gerassimov³^,1^,14, M. Godbersen³, P. Grafström⁵, T. Haller³, M. Heidrich³, E. Hubbard³, R.B. Hurst², K. Königsmann³^,15, I. Konorov³^,1^,14, S. Kovalenko⁷, N. Keller⁶, K. Martens⁶^,16, P. Martin⁴, S. Masciocchi³^,17, R. Michaels³^,11, U. Müller⁸, H. Neeb³, D. Newbold⁹, C. Newsom¹⁸, S. Paul³^,14, J. Pochodzalla³^,6, I. Potashnikova³^,7, B. Povh³, Z. Ren³, M. Rey-Campagnolle⁴^,19, G. Rosner⁸^,20, L. Rossi², H. Rudolph⁸, C. Scheel²¹, L. Schmitt⁸^,17, H.-W. Siebert⁶^,8, A. Simon⁷^,15, V. Smith⁹, O. Thilmann⁷, A. Trombini³, E. Vesin⁴, B. Volkemer⁸, K. Vorwalter³, T. Walcher⁸, G. Wälder⁷, R. Werding³, E. Wittmann³, M.V. Zavertyaev¹^* and The WA89 Collaboration

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

Abstract

We present a comprehensive study of the inclusive production of V⁰V⁰ pairs (V⁰=Λ, Λ̄ or K_S ) 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 x_F 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 K_S K_S mass distribution and inclusive production cross sections were measured. No signal was found from the double-strange H-dibaryon decaying to ΛΛ.