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Your search keyword '"K W. Krger"' showing total 2 results
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2 results on '"K W. Krger"'

1. High-xT single-spin asymmetry in π0 and η production at xF=0 by 200 GeV polarized antiprotons and protons

Author

A. Matulenko Yu, S. Makino, V. L. Solovyanov, A N. Vasilev, Kozo Miyake, Y. Goto, Fujio Takeutchi, N. Tamura, G. Salvato, Nobuhiko. Saito, J. Cranshaw, VL Rykov, J. D. Cossairt, D. Grosnick, Takashi Maki, H. Funahashi, A. Michalowicz, H. M. Spinka, N. I. Belikov, N. Tanaka, S. B. Nurushev, D. Hill, K. Kuroda, Anna Zanetti, S. Yamashita, Yasar Onel, A. Yokosawa, F. Luehring, F. Nessi-Tedaldi, J. Skeens, M. Laghai, Kazuo Iwatani, D. L. Adams, Antonio Villari, A A. Derevshchikov, A. de Lesquen, T. Yoshida, Akira Masaike, M. D. Corcoran, Ryuichi Takashima, M. Nessi, L. van Rossum, O. A. Grachov, J. Bystricky, G. Pauletta, Y. Ohashi, K W. Krger, Aldo Penzo, T. Nagamine, C. Nguyen, A P. Meshchanin, K. Imai, P. Schiavon, David Miller, D. I. Patalakha, A.L. Read, N. Akchurin, F. Lehar, J. L. White, D. G. Underwood, Jay Roberts, Yoshitaka Itow, D. Lopiano, and H. En'yo

Subjects
Physics, Nuclear and High Energy Physics, Meson, media_common.quotation_subject, Hadron, Elementary particle, CONSTITUENTS, SCATTERING, GEV/C, Asymmetry, Nuclear physics, Pion, Antiproton, High Energy Physics::Experiment, Nuclear Experiment, Boson, Spin-½, media_common
Abstract

A measurement of the single-spin asymmetry A(N) in P up + P --> pi-0 + X at 200 GeV with x(F) = O shows a transition in the production process from a "low-x(T)" regime with A(N) = 0, through an intermediate region of negative asymmetry, to a "high-x(T)" regime with A(N) > 0.3. This transition occurs at x(T) almost-equal-to 0.4 and is consistent with x(T)-scaling of A(N) in pion production using polarized beams or targets from square-root -s = 5.2 to 19.4 GeV. Results for A(N) in eta-production by polarized protons and in pi-0 production by polarized antiprotons are also presented.

Published
1992

2. First results for the two-spin parameter ALL in pi0 production by 200 GeV polarized protons and antiprotons

Author

VL Rykov, N. Tamura, S. Makino, Kozo Miyake, J. Bystricky, M. Laghai, Y. Goto, G. Durand, S. B. Nurushev, A. Michalowicz, N. Tanaka, D. G. Underwood, Nural Akchurin, J. Shepard, L. van Rossum, C. Nguyen, T. Kasprzyk, Anna Zanetti, Akira Masaike, F. Takeutchi, T. Yoshida, K. Fukuda, Yasar Onel, J. B. Roberts, D. Lopiano, A N. Vasilev, V. L. Solovyanov, J. L. White, Y. Ohashi, K. Imai, J. Deregel, A. Matulenko Yu, D. I. Patalakha, H. Funahashi, P. Schiavon, F. Nessi-Tedaldi, K. Iwatani, A. Villari, P. Chaumette, David H. Adams, D. H. Miller, M. D. Corcoran, N. I. Belikov, A. Yokosawa, M. Nessi, S. Yamashita, O. A. Grachov, K. Kuroda, Y. Itow, J. Fabre, D. Grosnick, H. En'yo, G. Salvato, D. Hill, H M. Spinka, A. L. Read, J. Skeens, G. Pauletta, R. Takashima, T. Nagamine, A A. Derevshchikov, A. de Lesquen, K W. Krger, Nobuhiko. Saito, F. Lehar, Takashi Maki, A. Penzo, A P. Meshchanin, J. Cranshaw, F. Luehring, and J. D. Cossairt

Subjects
Physics, Nuclear and High Energy Physics, Proton, Polarization (waves), Gluon, Nuclear physics, Antiproton, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Spin density, Spin (physics), Nuclear Experiment, SPIN-SPIN ASYMMETRIES, BEAM
Abstract

The two-spin parameter A(LL) in inclusive pi-0 production by longitudinally-polarized protons and antiprotons on a longitudinally-polarized proton target has been measured at the 200 GeV Fermilab spin physics facility, for pi-0,s at X(F) = 0 with 1 less-than-or-equal-to p(t) less-than-or-equal-to 3 GeV/c. The results exclude, at the 95% confidence level, values of A(LL) (pp) > 0.1 and < -0.1, for pi-0,s produced by protons, and values of A(LL) (antiproton-antiproton) > 0.1 and < -0.2 for incident antiprotons. The relevance of A(LL) (pp) for the gluon spin density is discussed. The data are in good agreement with "conventional", small or zero, gluon polarization.

Published
1991
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