Polarization of Ξ- and Ω- hyperons produced from neutral beams

D. M. Woods; P. M. Border; D. P. Ciampa; G. Guglielmo; K. J. Heller; N. B. Wallace; K. A. Johns; Y. T. Gao; M. J. Longo; R. Rameika

doi:10.1103/PhysRevD.54.6610

Polarization of Ξ- and Ω- hyperons produced from neutral beams

D. M. Woods, P. M. Border, D. P. Ciampa, G. Guglielmo, K. J. Heller, N. B. Wallace, K. A. Johns, Y. T. Gao, M. J. Longo, R. Rameika

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We have studied the polarization of Ξ- and Ω- hyperons produced by high energy neutral particle beams. An unpolarized neutral beam striking a target at ±1.8 mrad produced 1.4×10⁷Ξ-‘s with an average momentum of 395 GeV/c which were unpolarized, within a sensitivity limit of 0.007, and 2.2 × 2.2 × 10⁵ Ω-‘s with a polarization of +0.042±0.007 at an average momentum of 374 GeV/c. A polarized neutral beam striking a target at 0.0 mrad produced 7.1×10⁵Ξ-‘s which had a polarization of -0.118±0.004 at an average momentum of 393 GeV/c and 1.8 × 10⁴ Ω-‘s with a polarization of -0.069±0.023 at an average momentum of 394 GeV/c. The polarized neutral beam measurement is in good agreement with a previous measurement. The unpolarized neutral beam results are not understood in the context of the current models of hyperon polarization.

Original language	English (US)
Pages (from-to)	6610-6619
Number of pages	10
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	54
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.54.6610
State	Published - 1996

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@article{871c832533014bb49cb05be6c22de45b,

title = "Polarization of Ξ- and Ω- hyperons produced from neutral beams",

abstract = "We have studied the polarization of Ξ- and Ω- hyperons produced by high energy neutral particle beams. An unpolarized neutral beam striking a target at ±1.8 mrad produced 1.4×107Ξ-{\textquoteleft}s with an average momentum of 395 GeV/c which were unpolarized, within a sensitivity limit of 0.007, and 2.2 × 2.2 × 105 Ω-{\textquoteleft}s with a polarization of +0.042±0.007 at an average momentum of 374 GeV/c. A polarized neutral beam striking a target at 0.0 mrad produced 7.1×105Ξ-{\textquoteleft}s which had a polarization of -0.118±0.004 at an average momentum of 393 GeV/c and 1.8 × 104 Ω-{\textquoteleft}s with a polarization of -0.069±0.023 at an average momentum of 394 GeV/c. The polarized neutral beam measurement is in good agreement with a previous measurement. The unpolarized neutral beam results are not understood in the context of the current models of hyperon polarization.",

author = "Woods, \{D. M.\} and Border, \{P. M.\} and Ciampa, \{D. P.\} and G. Guglielmo and Heller, \{K. J.\} and Wallace, \{N. B.\} and Johns, \{K. A.\} and Gao, \{Y. T.\} and Longo, \{M. J.\} and R. Rameika",

year = "1996",

doi = "10.1103/PhysRevD.54.6610",

language = "English (US)",

volume = "54",

pages = "6610--6619",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

publisher = "American Physical Society",

number = "11",

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T1 - Polarization of Ξ- and Ω- hyperons produced from neutral beams

AU - Woods, D. M.

AU - Border, P. M.

AU - Ciampa, D. P.

AU - Guglielmo, G.

AU - Heller, K. J.

AU - Wallace, N. B.

AU - Johns, K. A.

AU - Gao, Y. T.

AU - Longo, M. J.

AU - Rameika, R.

PY - 1996

Y1 - 1996

N2 - We have studied the polarization of Ξ- and Ω- hyperons produced by high energy neutral particle beams. An unpolarized neutral beam striking a target at ±1.8 mrad produced 1.4×107Ξ-‘s with an average momentum of 395 GeV/c which were unpolarized, within a sensitivity limit of 0.007, and 2.2 × 2.2 × 105 Ω-‘s with a polarization of +0.042±0.007 at an average momentum of 374 GeV/c. A polarized neutral beam striking a target at 0.0 mrad produced 7.1×105Ξ-‘s which had a polarization of -0.118±0.004 at an average momentum of 393 GeV/c and 1.8 × 104 Ω-‘s with a polarization of -0.069±0.023 at an average momentum of 394 GeV/c. The polarized neutral beam measurement is in good agreement with a previous measurement. The unpolarized neutral beam results are not understood in the context of the current models of hyperon polarization.

AB - We have studied the polarization of Ξ- and Ω- hyperons produced by high energy neutral particle beams. An unpolarized neutral beam striking a target at ±1.8 mrad produced 1.4×107Ξ-‘s with an average momentum of 395 GeV/c which were unpolarized, within a sensitivity limit of 0.007, and 2.2 × 2.2 × 105 Ω-‘s with a polarization of +0.042±0.007 at an average momentum of 374 GeV/c. A polarized neutral beam striking a target at 0.0 mrad produced 7.1×105Ξ-‘s which had a polarization of -0.118±0.004 at an average momentum of 393 GeV/c and 1.8 × 104 Ω-‘s with a polarization of -0.069±0.023 at an average momentum of 394 GeV/c. The polarized neutral beam measurement is in good agreement with a previous measurement. The unpolarized neutral beam results are not understood in the context of the current models of hyperon polarization.

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DO - 10.1103/PhysRevD.54.6610

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JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 11

ER -

Polarization of Ξ- and Ω- hyperons produced from neutral beams

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