Probing the Pomeron spin-flip with Coulomb-nuclear interference

B. Z. Kopeliovich; M. Krelina

Probing the Pomeron spin-flip with Coulomb-nuclear interference

High Energy Physics - Phenomenology 2021-02-03 v4

Authors: B. Z. Kopeliovich , M. Krelina

Abstract

Brand-new high-precision data for single-spin asymmetry $A_N(t)$ in small angle elastic $pp$ scattering from the fixed target experiment HJET at BNL at $E_{lab}=100$ and $255 \mbox{ GeV}$ , as well as high energy STAR measurements at $\sqrt{s}=200 \mbox{ GeV}$ , for the first time allowed to determine the spin-flip to non-flip ratio $r_5(t)$ 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.

Keywords

isospin symmetry breaking spin polarization and magnetic phenomena magnetic resonance

Cite

@article{arxiv.1910.04799,
  title  = {Probing the Pomeron spin-flip with Coulomb-nuclear interference},
  author = {B. Z. Kopeliovich and M. Krelina},
  journal= {arXiv preprint arXiv:1910.04799},
  year   = {2021}
}

Comments

This paper is withdrawn due to shortcomings and the updated paper will be submitted as new because of significant changes in the concept of the paper

Probing the Pomeron spin-flip with Coulomb-nuclear interference

Abstract

Keywords

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