Measurement of analyzing power for proton-carbon elastic scattering in the coulomb-nuclear interference region with a 22-GeV/c polarized proton beam.
/ Authors
J. Tojo, I. Alekseev, M. Bai, B. Bassalleck, G. Bunce, A. Deshpande, J. Doskow, S. Eilerts, D. Fields, Y. Goto
and 27 more authors
H. Huang, V. Hughes, K. Imai, M. Ishihara, V. Kanavets, K. Kurita, K. Kwiatkowski, B. Lewis, W. Lozowski, Y. Makdisi, H. Meyer, B. Morozov, M. Nakamura, B. Przewoski, T. Rinckel, T. Roser, A. Rusek, N. Saito, B. Smith, D. Svirida, M. Syphers, A. Taketani, T. Thomas, D. Underwood, D. Wolfe, K. Yamamoto, L. Zhu
/ Abstract
The analyzing power for proton-carbon elastic scattering in the Coulomb-nuclear interference region of momentum transfer, 9.0x10(-3)<-t<4.1x10(-2) (GeV/c)(2), was measured with a 21.7 GeV/c polarized proton beam at the Alternating Gradient Synchrotron of Brookhaven National Laboratory. The ratio of hadronic spin-flip to nonflip amplitude, r(5), was obtained from the analyzing power to be Rer(5)=0.088+/-0.058 and Imr(5)=-0.161+/-0.226.
Journal: Physical review letters