Measurement of the analyzing power in the Primakoff process with a high-energy polarized proton beam

D. C. Carey, R. N. Coleman, M. D. Corcoran, J. D. Cossairt, A. A. Derevschikov, D. P. Grosnick, D. Hill, K. Imai, A. Konaka, K. Kuroda, F. Lehar, A. De Lesquen, D. Lopiano, F. C. Luehring, T. Maki, S. Makino, A. Masaike, Yu A. Matulenko, A. P. Meschanin, A. MichalowiczD. H. Miller, K. Miyake, T. Nagamine, T. Nakano, F. Nessi-Tedaldi, M. Nessi, C. Nguyen, S. B. Nurushev, Y. Ohashi, G. Pauletta, A. Penzo, G. C. Phillips, A. L. Read, J. B. Roberts, L. Van Rossum, G. Salvato, P. Schiavon, T. Shima, V. L. Solovyanov, H. Spinka, R. W. Stanek, R. Takashima, F. Takeutchi, N. Tamura, N. Tanaka, D. G. Underwood, A. N. Vasiliev, A. Villari, J. L. White, A. Yokosawa, T. Yoshida, A. Zanetti

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The analyzing power (spin-dependent azimuthal asymmetry) has been observed for the first time in the nuclear Coulomb coherent production process, the Primakoff process, with the use of the newly constructed 185-GeV/c Fermilab polarized proton beam. We have observed a large asymmetry of this process in the regions of <0.001 (GeV/c)2 and 1.36<M(0p)<1.52 GeV/c2, where the Coulomb process is predominant. The measured asymmetry is consistent with the analyzing power of the existing low-energy +p0+p data.

Original languageEnglish
Pages (from-to)357-360
Number of pages4
JournalPhysical review letters
Issue number4
Publication statusPublished - 1990
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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