Search for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>Ξ</mi></mrow><mrow><mo>*</mo><mo>−</mo></mrow></msup></mrow></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>Σ</mi></mrow><mrow><mo>*</mo><mo>−</mo></mrow></msup></mrow></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>Ω</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math> production by negative hyperons on nuclei

V. Hungerbühler; R. Majka; J. N. Marx; P. Némethy; J. Sandweiss; W. Tanenbaum; W. J. Willis; M. Atac; S. Ecklund; P. J. Gollon; J. Lach; J. MacLachlan; A. Roberts; R. Stefanski; D. Theriot; C. L. Wang; W. Cleland; E. Engels; D. I. Lowenstein, Jr; N. Scribner; J. Thompson

doi:10.1103/PhysRevD.10.2051

Search for $Ξ^{* -}$ , $Σ^{* -}$ , and $Ω^{-}$ production by negative hyperons on nuclei

V. Hungerbühler, R. Majka, J. N. Marx, P. Némethy, J. Sandweiss, W. Tanenbaum, W. J. Willis, M. Atac, S. Ecklund, P. J. Gollon, J. Lach, J. MacLachlan, A. Roberts, R. Stefanski, D. Theriot, C. L. Wang, W. Cleland, E. Engels, D. I. Lowenstein, Jr., N. Scribner, and J. Thompson

Phys. Rev. D 10, 2051 – Published 1 October 1974

Abstract

The reactions of 24.6-GeV/c $Σ^{-}$ and $Ξ^{-}$ incident on a scintillator target were studied in a counter-spark chamber experiment. Upper limits on the production cross sections of $Σ^{* -}$ resonances which decay into $Λ^{0} π^{-}$ and $Ξ^{* -}$ resonances which decay into $Λ^{0} K^{-}$ were obtained. A single $Ω^{-}$ that was produced in the scintillator target has been observed, corresponding to a 115-μb/nucleon production cross section if produced by a $Ξ^{-}$ . The $Λ^{0} π^{-}$ mass spectrum was found to be consistent with a Deck-type threshold enhancement.

Received 6 May 1974

DOI:https://doi.org/10.1103/PhysRevD.10.2051

Authors & Affiliations

V. Hungerbühler^*,‡, R. Majka^‡, J. N. Marx^‡, P. Némethy^‡, J. Sandweiss^‡, W. Tanenbaum^‡, and W. J. Willis^†,‡

Yale University, New Haven, Connecticut 06520

M. Atac^§, S. Ecklund^§, P. J. Gollon^§, J. Lach^§, J. MacLachlan^§, A. Roberts^§, R. Stefanski^§, and D. Theriot^§

Fermi National Accelerator Laboratory, Batavia, Illinois 60510

C. L. Wang^∥

Brookhaven National Laboratory, Upton, New York 11973

W. Cleland^††, E. Engels^††, D. I. Lowenstein, Jr.^¶,††, N. Scribner^**,††, and J. Thompson^††

University of Pittsburgh, Pittsburgh, Pennsylvania 15260

^*Present address: Dépt. de Physique Nucléaire et Corpusculaire, Université de Genève, Geneva, Switzerland.
^†Present address: CERN, 1211 Geneva 23, Switzerland.
^‡Research supported by the United States Atomic Energy Commission under Contract No. AT (11-1).
^§Operated by Universities Research Association, Inc. under contract with the United States Atomic Energy Commission.
^∥Work supported by the United States Atomic Energy Commission.
^¶Present address: Brookhaven National Laboratory, Upton, New York 11973.
^**Present address: Bell Laboratories, Holmdell, New Jersey 07733.
^††Work supported in part by the National Science Foundation.

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Vol. 10, Iss. 7 — 1 October 1974

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