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Roman Pasechnik

Senior lecturer

Typical working day..

Lévy imaging of elastic scattering and proton hollowness at 13 TeV

Author

  • T. Csörgo
  • R. Pasechnik
  • A. Ster

Summary, in English

The shape of elastic differential cross section within and beyond the diffractive cone at 13 TeV pp collision energy has been shown to be precisely described by the Lévy series expansion in whole available range of momentum transfers. This way, the crucial information about the real and imaginary parts of the elastic amplitude has been obtained resulting in precision reconstruction of the proton inelasticity profile. We have found that the profile function P(b) undergoes a qualitative change at √s ≈ 7 TeV collision energy. At small values of the impact parameter b a P(b) ≈ 1 plateaux develops, which becomes depressed at larger energies, such that a shallow minimum is formed near b = 0. We have evaluated the corresponding error bar and found such a hotly debated proton hollowness (or “black-ring”) effect with beyond 5σ significance.

Department/s

  • Theoretical Particle Physics

Publishing year

2019

Language

English

Publication/Series

Proceedings of Science

Volume

364

Document type

Conference paper

Topic

  • Subatomic Physics

Conference name

2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019

Conference date

2019-07-10 - 2019-07-17

Conference place

Ghent, Belgium

Status

Published

ISBN/ISSN/Other

  • ISSN: 1824-8039