Phys. Rev. C
72,
055201
(2005)
[5 pages]
Search for the pentaquark candidate Θ(1540)+ in the hyperon beam experiment WA89
M. I. Adamovich et al. WA89 Collaboration
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M. I. Adamovich1,*, Yu. A. Alexandrov1, S. P. Baranov1, D. Barberis2, M. Beck3, C. Bérat4, W. Beusch5, M. Boss6, S. Brons3,†, W. Brückner3, M. Buénerd4, C. Busch6, C. Büscher3, F. Charignon4, J. Chauvin4, E. A. Chudakov6,‡, U. Dersch3, F. Dropmann3, J. Engelfried6,§, F. Faller6,**, A. Fournier4, S. G. Gerassimov3,1,††, M. Godbersen3, P. Grafström5, Th. Haller3, M. Heidrich3, E. Hubbard3, R. B. Hurst2, K. Königsmann3,††, I. Konorov3,1,‡‡, N. Keller6, K. Martens6,a, Ph. Martin4, S. Masciocchi3,b, R. Michaels3,‡, U. Müller7, H. Neeb3, D. Newbold8, C. Newsom9, S. Paul3,‡‡, J. Pochodzalla3,c, I. Potashnikova3, B. Povh3, R. Ransome10, Z. Ren3, M. Rey-Campagnolle4,d, G. Rosner7,e, L. Rossi2, H. Rudolph7, C. Scheel11, L. Schmitt7,‡‡, H.-W. Siebert6,f, A. Simon6,††, V. J. Smith8, O. Thilmann6, A. Trombini3, E. Vesin4, B. Volkemer7, K. Vorwalter3, Th. Walcher7, G. Wälder6, R. Werding3, E. Wittmann3, and M. V. Zavertyaev1 (WA89 Collaboration)
1Moscow Lebedev Physics Institute, RU-117924, Moscow, Russia
2Genoa University/INFN, Dipartimento di Fisica, I-16146 Genova, Italy
3Max-Planck-Institut für Kernphysik, Postfach 103980, D-69029 Heidelberg, Germany
4Grenoble ISN, F-38026 Grenoble, France
5CERN, CH-1211 Genève 23, Switzerland
6Universität Heidelberg, Physikalisches Institut, D-69120 Heidelberg, Germany
7Universität Mainz, Institut für Kernphysik, D-55099 Mainz, Germany
8University of Bristol, Bristol, United Kingdom
9University of Iowa, Iowa City, Iowa 52242, USA
10Rutgers University, Piscataway, New Jersey 08854, USA
11NIKHEF, 1009 D8 Amsterdam, The Netherlands
Received 26 July 2005; published 16 November 2005
We report on a high-statistics search for the Θ(1540)+ resonance in Σ--nucleus collisions at 340 GeV/c. No evidence for this resonance was found in our data sample which contains 13 million Ks0→π+π- decays above background. For the decay channel Θ+→Ks0p and the kinematic range xF> 0.05, we find the production cross section to be BR(Θ+→Ks0p)σ0<1.8 μb per nucleon at 99% C.L.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.72.055201
DOI:
10.1103/PhysRevC.72.055201
*Deceased. †Present address: TRIUMF, Vancouver, B.C., Canada V6T 2A3. ‡Present address: Thomas Jefferson Lab, Newport News, VA 23606, USA. §Present address: Institudo de Fisica, Universidad San Luis Potosi, S.L.P. 78240, Mexico. **Present address: Fraunhofer Institut für Solarenergiesysteme, D-79100 Freiburg, Germany. ††Present address: Fakultät für Physik, Universität Freiburg, Germany. ‡‡Present address: Technische Universität München, Garching, Germany. aPresent address: Department of Physics, University of Utah, Salt Lake City, Utah 84112-0830, USA. bPresent address: Max-Planck-Institute für Physik, München, Germany. cContact person: pochodza@kph.uni-mainz.de; Present address: Universität Mainz, Institut für Kernphysik, D-55099 Mainz, Germany. dPresent address: CERN, CH-1211 Genève 23, Switzerland. ePresent address: Dept. of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom. fPresent address: Universität Mainz, Institut für Kernphysik, D-55099 Mainz, Germany.
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