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  • Letter
  • Open Access

When invariable cross sections change: The Electron-Ion Collider case

Krzysztof Piotrzkowski*

Mariusz Przybycien†

  • Centre for Cosmology, Particle Physics and Phenomenology, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium

  • AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Aleje Mickiewicza 30, 30-059 Kraków, Poland

  • *krzysztof.piotrzkowski@cern.ch
  • †mariusz.przybycien@agh.edu.pl
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Phys. Rev. D 103, L051901 – Published 5 March, 2021

DOI: https://doi.org/10.1103/PhysRevD.103.L051901

Abstract

In everyday research, it is tacitly assumed that scattering cross sections have fixed values for a given particle species, center-of-mass energy, and particle polarization. However, this assumption has been called into question after several observations of suppression of high-energy bremsstrahlung. This process will play a major role in experiments at the future Electron-Ion Collider, and we show how variations of the bremsstrahlung cross section can be profoundly studied there using the lateral beam displacements. In particular, we predict a very strong increase of the observed cross sections for large beam separations. We also discuss the relation of these elusive effects to other quantum phenomena occurring over macroscopic distances. In this context, spectacular and possibly useful properties of the coherent bremsstrahlung at the Electron-Ion Collider are also evaluated.

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Phys. Rev. D 103, L051901– Published 5 March, 2021
  • Received 24 November 2020
  • Accepted 16 December 2020
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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