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arXiv · 2312.03702

Coulomb-Nuclear Interference in polarized pA scattering

B. Z. Kopeliovich·M. Krelina·I. K. Potashnikova
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Abstract

We made the first attempt to understand the observed unusual t dependence of single-spin asymmetry observed in the HJET experiment at RHIC. Usually, the interaction of hadrons is presented as a long-range Coulomb interaction and a short-range strong interaction with Coulomb corrections. Such a division gives rise to a Coulomb phase of the hadronic term. Conversely, here we consider short-range hadronic interaction as a correction to the long-range electromagnetic term, i.e., we treat it as an absorptive correction. This significantly affects the Coulomb-nuclear interference, which is a source of single-spin azimuthal asymmetry at small angles.

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B. Z. Kopeliovich, M. Krelina, I. K. Potashnikova. 2023-12-06. Coulomb-Nuclear Interference in polarized pA scattering. https://arxiv.org/abs/2312.03702

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