Measurement of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>p</mi></mrow><mrow><mi>↑</mi></mrow></msub></mrow></math>+<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>p</mi></mrow><mrow><mi>↑</mi></mrow></msub></mrow></math>→p+p with a 16.5-GeV/c polarized proton beam

K. A. Brown; R. J. Bruni; P. R. Cameron; D. G. Crabb; R. L. Cummings; F. Z. Khiari; A. D. Krisch; A. M. T. Lin; R. S. Raymond; T. Roser; K. M. Terwilliger; G. T. Danby; L. G. Ratner; D. C. Peaslee; J. R. O’Fallon; J. B. Roberts; T. S. Bhatia; L. C. Northcliffe; M. Simonius

doi:10.1103/PhysRevD.31.3017

Rapid Communication

Measurement of $p_{↑}$ + $p_{↑}$ →p+p with a 16.5-GeV/c polarized proton beam

K. A. Brown, R. J. Bruni, P. R. Cameron, D. G. Crabb, R. L. Cummings, F. Z. Khiari, A. D. Krisch, A. M. T. Lin, R. S. Raymond, T. Roser, K. M. Terwilliger, G. T. Danby, L. G. Ratner, D. C. Peaslee, J. R. O’Fallon, J. B. Roberts, T. S. Bhatia, L. C. Northcliffe, and M. Simonius

Phys. Rev. D 31, 3017(R) – Published 1 June 1985

Abstract

Using the new Brookhaven Alternating Gradient Synchrotron polarized proton beam and our polarized proton target, we measured the spin-spin correlation parameter $A_{nn}$ in 16.5-GeV/c proton-proton elastic scattering. We found an $A_{nn}$ of (6.1±3.0)% at $P_{⊥}$ $^{2}$ =2.2 (GeV/c $)^{2}$ . We also measured the analyzing power A in two independent ways, providing a good test of possible experimental errors. Comparing our new data with 12-GeV Argonne Zero Gradient Synchrotron data shows no evidence for strong energy dependence in $A_{nn}$ in this medium- $P_{⊥}$ $^{2}$ region.