Lévy imaging of elastic scattering and proton hollowness at 13 TeV

T. Csörgo, R. Pasechnik, A. Ster

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationEuropean Physical Society Conference on High Energy Physics (EPS-HEP2019)
Volume364
DOIs
Publication statusPublished - 2019
Event2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 - Ghent, Belgium
Duration: 2019 Jul 102019 Jul 17

Publication series

NameProceedings of Science
PublisherSissa Medialab srl
ISSN (Print)1824-8039

Conference

Conference2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019
Country/TerritoryBelgium
CityGhent
Period2019/07/102019/07/17

Subject classification (UKÄ)

  • Subatomic Physics

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