Polarization of Λ and Λ produced by 800-GeV protons

E. J. Ramberg; G. J. Bock; R. Coleman; M. Crisler; J. Enagonio; R. Ford; Y. B. Hsiung; D. A. Jensen; R. Tschirhart; K. Arisaka; D. Roberts; W. Slater; M. Weaver; R. A. Briere; E. Cheu; D. A. Harris; P. Krolak; G. Makoff; K. S. McFarland; A. Roodman; B. Schwingenheuer; S. Somalwar; Y. W. Wah; B. Winstein; R. Winston; A. R. Barker; E. C. Swallow; E. M. Collins; G. D. Gollin; T. Nakaya; T. Yamanaka; P. Gu; P. Haas; W. P. Hogan; S. Kim; J. N. Matthews; S. S. Myung; S. Schnetzer; G. Thomson; Y. Zou

doi:10.1016/0370-2693(94)91397-8

Polarization of Λ and Λ produced by 800-GeV protons

E. J. Ramberg, G. J. Bock, R. Coleman, M. Crisler, J. Enagonio, R. Ford, Y. B. Hsiung, D. A. Jensen, R. Tschirhart, K. Arisaka, D. Roberts, W. Slater, M. Weaver, R. A. Briere, E. Cheu, D. A. Harris, P. Krolak, G. Makoff, K. S. McFarland, A. RoodmanB. Schwingenheuer, S. Somalwar, Y. W. Wah, B. Winstein, R. Winston, A. R. Barker, E. C. Swallow, E. M. Collins, G. D. Gollin, T. Nakaya, T. Yamanaka, P. Gu, P. Haas, W. P. Hogan, S. Kim, J. N. Matthews, S. S. Myung, S. Schnetzer, G. Thomson, Y. Zou

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Abstract

We have measured the polarization of Λ and Λ hyperons produced by 800 GeV protons on a Be target at a fixed targeting angle of 4.8 mrad. Comparison with previous data at 400 GeV production energy and twice the targeting angle shows no significant energy dependence for the Λ polarization. This is in striking contrast to the energy dependence found for σ⁺ and Ξ^- polarizations. We find no evidence for Λ polarization at 800 GeV.

Original language	English (US)
Pages (from-to)	403-408
Number of pages	6
Journal	Physics Letters B
Volume	338
Issue number	2-3
DOIs	https://doi.org/10.1016/0370-2693(94)91397-8
State	Published - Oct 27 1994
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Ramberg, E. J., Bock, G. J., Coleman, R., Crisler, M., Enagonio, J., Ford, R., Hsiung, Y. B., Jensen, D. A., Tschirhart, R., Arisaka, K., Roberts, D., Slater, W., Weaver, M., Briere, R. A., Cheu, E., Harris, D. A., Krolak, P., Makoff, G., McFarland, K. S., ... Zou, Y. (1994). Polarization of Λ and Λ produced by 800-GeV protons. Physics Letters B, 338(2-3), 403-408. https://doi.org/10.1016/0370-2693(94)91397-8

Ramberg, EJ, Bock, GJ, Coleman, R, Crisler, M, Enagonio, J, Ford, R, Hsiung, YB, Jensen, DA, Tschirhart, R, Arisaka, K, Roberts, D, Slater, W, Weaver, M, Briere, RA, Cheu, E, Harris, DA, Krolak, P, Makoff, G, McFarland, KS, Roodman, A, Schwingenheuer, B, Somalwar, S, Wah, YW, Winstein, B, Winston, R, Barker, AR, Swallow, EC, Collins, EM, Gollin, GD, Nakaya, T, Yamanaka, T, Gu, P, Haas, P, Hogan, WP, Kim, S, Matthews, JN, Myung, SS, Schnetzer, S, Thomson, G & Zou, Y 1994, 'Polarization of Λ and Λ produced by 800-GeV protons', Physics Letters B, vol. 338, no. 2-3, pp. 403-408. https://doi.org/10.1016/0370-2693(94)91397-8

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title = "Polarization of Λ and Λ produced by 800-GeV protons",

abstract = "We have measured the polarization of Λ and Λ hyperons produced by 800 GeV protons on a Be target at a fixed targeting angle of 4.8 mrad. Comparison with previous data at 400 GeV production energy and twice the targeting angle shows no significant energy dependence for the Λ polarization. This is in striking contrast to the energy dependence found for σ+ and Ξ- polarizations. We find no evidence for Λ polarization at 800 GeV.",

author = "Ramberg, {E. J.} and Bock, {G. J.} and R. Coleman and M. Crisler and J. Enagonio and R. Ford and Hsiung, {Y. B.} and Jensen, {D. A.} and R. Tschirhart and K. Arisaka and D. Roberts and W. Slater and M. Weaver and Briere, {R. A.} and E. Cheu and Harris, {D. A.} and P. Krolak and G. Makoff and McFarland, {K. S.} and A. Roodman and B. Schwingenheuer and S. Somalwar and Wah, {Y. W.} and B. Winstein and R. Winston and Barker, {A. R.} and Swallow, {E. C.} and Collins, {E. M.} and Gollin, {G. D.} and T. Nakaya and T. Yamanaka and P. Gu and P. Haas and Hogan, {W. P.} and S. Kim and Matthews, {J. N.} and Myung, {S. S.} and S. Schnetzer and G. Thomson and Y. Zou",

note = "Funding Information: We thank the Fermilab management and staff and the technical staffs of the participating institutions for their vital contributions. This work was supported in part by the US Department of Energy and the US National Science Foundation. One of us (Y.W.W.) wishes to acknowledge support from a DOE Outstanding Young Investigator grant and a Block Grant Award from the University of Chicago Enrico Fermi Institute.",

year = "1994",

month = oct,

day = "27",

doi = "10.1016/0370-2693(94)91397-8",

language = "English (US)",

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T1 - Polarization of Λ and Λ produced by 800-GeV protons

AU - Ramberg, E. J.

AU - Bock, G. J.

AU - Coleman, R.

AU - Crisler, M.

AU - Enagonio, J.

AU - Ford, R.

AU - Hsiung, Y. B.

AU - Jensen, D. A.

AU - Tschirhart, R.

AU - Arisaka, K.

AU - Roberts, D.

AU - Slater, W.

AU - Weaver, M.

AU - Briere, R. A.

AU - Cheu, E.

AU - Harris, D. A.

AU - Krolak, P.

AU - Makoff, G.

AU - McFarland, K. S.

AU - Roodman, A.

AU - Schwingenheuer, B.

AU - Somalwar, S.

AU - Wah, Y. W.

AU - Winstein, B.

AU - Winston, R.

AU - Barker, A. R.

AU - Swallow, E. C.

AU - Collins, E. M.

AU - Gollin, G. D.

AU - Nakaya, T.

AU - Yamanaka, T.

AU - Gu, P.

AU - Haas, P.

AU - Hogan, W. P.

AU - Kim, S.

AU - Matthews, J. N.

AU - Myung, S. S.

AU - Schnetzer, S.

AU - Thomson, G.

AU - Zou, Y.

N1 - Funding Information: We thank the Fermilab management and staff and the technical staffs of the participating institutions for their vital contributions. This work was supported in part by the US Department of Energy and the US National Science Foundation. One of us (Y.W.W.) wishes to acknowledge support from a DOE Outstanding Young Investigator grant and a Block Grant Award from the University of Chicago Enrico Fermi Institute.

PY - 1994/10/27

Y1 - 1994/10/27

N2 - We have measured the polarization of Λ and Λ hyperons produced by 800 GeV protons on a Be target at a fixed targeting angle of 4.8 mrad. Comparison with previous data at 400 GeV production energy and twice the targeting angle shows no significant energy dependence for the Λ polarization. This is in striking contrast to the energy dependence found for σ+ and Ξ- polarizations. We find no evidence for Λ polarization at 800 GeV.

AB - We have measured the polarization of Λ and Λ hyperons produced by 800 GeV protons on a Be target at a fixed targeting angle of 4.8 mrad. Comparison with previous data at 400 GeV production energy and twice the targeting angle shows no significant energy dependence for the Λ polarization. This is in striking contrast to the energy dependence found for σ+ and Ξ- polarizations. We find no evidence for Λ polarization at 800 GeV.

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UR - http://www.scopus.com/inward/citedby.url?scp=0000820098&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(94)91397-8

DO - 10.1016/0370-2693(94)91397-8

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SN - 0370-2693

VL - 338

SP - 403

EP - 408

JO - Physics Letters B

JF - Physics Letters B

IS - 2-3

ER -

Polarization of Λ and Λ produced by 800-GeV protons

Abstract

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