2019/10/10 by B. Z. Kopeliovich, Kopeliovich, B. Z., M. Krelina +1
Physics and Astronomy · #Atomic and Subatomic Physics Research #Crystallography and Radiation Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Magnetic confinement fusion research
paper · pdf · doi:10.48550/arxiv.1910.04799
openalex publication_date 2019/10/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Brand-new high-precision data for single-spin asymmetry AN(t) in small angle elastic pp scattering from the fixed target experiment HJET at BNL at Elab=100 and 255 GeV, as well as high energy STAR measurements at √(s)=200 GeV, for the first time allowed to determine the spin-flip to non-flip ratio r5(t) in a wide energy range. We introduced an essential modification in the Coulomb-nuclear interference (CNI) mechanism, missed in previous analyses. It can be formulated either as a modification of the Coulomb phase, which is much larger for the spin-flip compared with non-flip amplitudes, or as absorptive corrections to the electromagnetic interaction of hadrons. The Regge analysis singles out the Pomeron contribution to the spin-flip amplitude, which steeply rises with energy. We found the spin-flip to non-flip ratio of the Pomeron amplitudes to be nearly -10%, steeply rising with energy in accordance with theoretical expectations.