Impact picture for the analyzing power $A_N$ in very forward $pp$ elastic scattering

Abstract

In the framework of the impact picture we compute the analyzing power $A_N$ for $pp$ elastic scattering at high energy and in the very forward direction. We consider the full set of Coulomb amplitudes and show that the interference between the hadronic non-flip amplitude and the single-flip Coulomb amplitude is sufficient to obtain a good agreement with the present experimental data. This leads us to conclude that the single-flip hadronic amplitude is small in this low momentum transfer region and it strongly suggests that this process can be used as an absolute polarimeter at the BNL-RHIC $pp$ collider.

6 pages, 6 figures, to appear Physical Review D

References in corpus (10)

• Prospects for Spin Physics at RHIC
• The spin dependence of high energy proton scattering
• Impact-Picture Phenomenology for ${\pi }^{\pm }p,K^{\pm }p$ and $pp,\bar{p}p$
• Measurement of the analyzing power in pp elastic scattering in the peak CNI region at RHIC
• First Measurement of Proton-Proton Elastic Scattering at RHIC
• Interference between Coulomb and hadronic scattering in elastic high-energy nucleon collisions
• First Measurement of A_N at sqrt(s)=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC
• An absolute polarimeter for high energy protons
• Double Spin Asymmetries A_NN and A_SS at sqrt{s}=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC
• Proton-helium elastic scattering: a possible high-energy polarimeter at RHIC-BNL

Cited by in corpus (1)

• Single Spin Asymmetry $A_N$ in Polarized Proton-Proton Elastic Scattering at $\sqrt{s}=200$ GeV