Studies in the BNL 21-GeV/c negative-hyperon beam. I. <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Σ</mi></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Ξ</mi></math> production and asymmetry in the decay <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>Ξ</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mo>→</mo><mi>Λ</mi><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math>

W. E. Cleland; W. E. Cooper; M. Dris; E. Engels, Jr; M. L. Herbert; D. E. Kraus; J. A. Thompson; D. Lowenstein

doi:10.1103/PhysRevD.21.12

Access by Xinjiang University

Studies in the BNL 21-GeV/c negative-hyperon beam. I. $Σ$ and $Ξ$ production and asymmetry in the decay $Ξ^{-} \to Λ π^{-}$

W. E. Cleland, W. E. Cooper, M. Dris^*, E. Engels, Jr., M. L. Herbert^†, D. E. Kraus, and J. A. Thompson

D. Lowenstein

University of Pittsburgh, Pittsburgh, Pennsylvania 15260

Brookhaven National Laboratory, Upton, New York 11973

^*Present address: Physics Department, University of Pennsylvania, Philadelphia, Pennsylvania 19104.
^†Present address: Singer Co., Kearfott Division, 150 Totowa Rd., Wayne, New Jersey 07470

PDF

Phys. Rev. D 21, 12 – Published 1 January, 1980

DOI: https://doi.org/10.1103/PhysRevD.21.12

Abstract

In the Brookhaven National Laboratory 20.8-GeV/c negative-hyperon beam, we have measured the production ratios $\frac{Σ^{-}}{π^{-}}$ , $\frac{Ξ^{-}}{π^{-}}$ , and $\frac{Σ^{-}}{Ξ^{-}}$ by 29.4-GeV/c protons incident on Al and ${Al}_{2}$ $O_{3}$ targets. We have also measured the asymmetry parameter in the decay $Ξ^{-} \to Λ π^{-}$ and find $α_{Ξ^{-}} = - 0.49 \pm 0.04$ .

References (13)

J. A. Thompson et al., following paper, Phys. Rev. D 21, 25 (1980) M. L. Herbert, Ph.D. thesis, University of Pittsburgh, 1978 (unpublished)
V. Hungerbühler et al., Nucl. Instrum. Methods 115, 221 (1974)
W. J. Willis et al., Nucl. Instrum. Methods 91, 33 (1971)
K. J. Foley et al., Nucl. Instrum. Methods 108, 33 (1973)
E. F. McLaughlin et al., Nucl. Instrum. Methods 70, 343 (1969)
D. Freytag, Nucl. Instrum. Methods 138, 685 (1976)
V. L. Highland and R. J. Macek, Nucl. Instrum. Methods 64, 69 (1968)
D. I. Lowenstein, Nucl. Instrum. Methods 109, 589 (1973)
J. Badier et al., Phys. Lett. 39B, 414 (1972) V. Hungerbühler et al., Phys. Rev. Lett. 30, 1234 (1973)
J. Lach, private communication
K. Heller et al., Phys. Lett. 68B, 480 (1977)
G. Bunce et al., Phys. Rev. D 18, 633 (1978)
Particle Data Group, Phys. Lett. 75B, 1, (1978)

[c1] J. A. Thompson et al., following paper, Phys. Rev. D 21, 25 (1980) M. L. Herbert, Ph.D. thesis, University of Pittsburgh, 1978 (unpublished)

[c2] V. Hungerbühler et al., Nucl. Instrum. Methods 115, 221 (1974)

[c3] W. J. Willis et al., Nucl. Instrum. Methods 91, 33 (1971)

[c4] K. J. Foley et al., Nucl. Instrum. Methods 108, 33 (1973)

[c5] E. F. McLaughlin et al., Nucl. Instrum. Methods 70, 343 (1969)

[c6] D. Freytag, Nucl. Instrum. Methods 138, 685 (1976)

[c7] V. L. Highland and R. J. Macek, Nucl. Instrum. Methods 64, 69 (1968)

[c8] D. I. Lowenstein, Nucl. Instrum. Methods 109, 589 (1973)

[c9] J. Badier et al., Phys. Lett. 39B, 414 (1972) V. Hungerbühler et al., Phys. Rev. Lett. 30, 1234 (1973)

[c10] J. Lach, private communication

[c11] K. Heller et al., Phys. Lett. 68B, 480 (1977)

[c12] G. Bunce et al., Phys. Rev. D 18, 633 (1978)

[c13] Particle Data Group, Phys. Lett. 75B, 1, (1978)

Physical Review D

Export citation

Export citation

Studies in the BNL 21-GeV/c negative-hyperon beam. I. $Σ$ and $Ξ$ production and asymmetry in the decay $Ξ^{-} \to Λ π^{-}$

Abstract

References (13)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation

Studies in the BNL 21-GeV/c negative-hyperon beam. I. Σ and Ξ production and asymmetry in the decay Ξ−→Λπ−

Abstract

References (13)

Studies in the BNL 21-GeV/c negative-hyperon beam. I. $Σ$ and $Ξ$ production and asymmetry in the decay $Ξ^{-} \to Λ π^{-}$