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

D. L. Adams, N. Akchurin, N. I. Belikov, J. Bystricky, M. D. Corcoran, J. D. Cossairt, J. Cranshaw, A. A. Derevschikov, H. En'yo, H. Funahashi, Y. Goto, O. A. Grachov, D. P. Grosnick, D. A. Hill, K. Imai, Y. Itow, K. Iwatani, K. W. Krueger, K. Kuroda, M. LaghaiF. Lehar, A. de Lesquen, D. Lopiano, F. C. Luehring, T. Maki, S. Makino, A. Masaike, Yu A. Matulenko, A. P. Meschanin, A. Michalowicz, D. H. Miller, K. Miyake, T. Nagamine, F. Nessi-Tedaldi, M. Nessi, C. Nguyen, S. B. Nurushev, Y. Ohashi, Y. Onel, D. I. Patalakha, G. Pauletta, A. Penzo, A. L. Read, J. B. Roberts, L. van Rossum, V. L. Rykov, N. Saito, G. Salvato, P. Schiavon, J. Skeens, V. L. Solovyanov, H. Spinka, R. Takashima, F. Takeutchi, N. Tamura, N. Tanaka, D. G. Underwood, A. N. Vasiliev, A. Villari, J. L. White, S. Yamashita, A. Yokosawa, T. Yoshida, A. Zanetti

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40 Scopus citations


A measurement of the single-spin asymmetry AN in p↑ + p→π0 + X at 200 GeV with xF = 0 shows a transition in the production process from a "low-xT" regime with AN = 0, through an intermediate region of negative asymmetry, to a "high-xT" regime with AN > 0.3. This transition occurs at xT ≈ 0.4 and is consistent with xT-scaling of AN in pion production using polarized beams or targets from √-s=5.2 to 19.4 GeV. Results for AN in η production by polarized protons and in π0 production by polarized antiprotons are also presented.

Original languageEnglish
Pages (from-to)531-535
Number of pages5
JournalPhysics Letters B
Issue number4
StatePublished - Feb 20 1992


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