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joachiha

Joachim Hansen

SMARTHEP PhD student ESR10

joachiha

Exploring the Strong Interaction of Three-Body Systems at the LHC

Author

  • S. Acharya
  • S. Basu
  • P. Christiansen
  • J. Hansen
  • K.E. Iversen
  • O. Matonoha
  • R. Nepeivoda
  • A. Ohlson
  • D. Silvermyr
  • J. Staa
  • V. Vislavicius
  • N. Zurlo
Show all

Summary, in English

Deuterons are atomic nuclei composed of a neutron and a proton held together by the strong interaction. Unbound ensembles composed of a deuteron and a third nucleon have been investigated in the past using scattering experiments, and they constitute a fundamental reference in nuclear physics to constrain nuclear interactions and the properties of nuclei. In this work, K+-d and p-d femtoscopic correlations measured by the ALICE Collaboration in proton-proton (pp) collisions at √s ¼ 13 TeV at the Large Hadron Collider ffiffi (LHC) are presented. It is demonstrated that correlations in momentum space between deuterons and kaons or protons allow us to study three-hadron systems at distances comparable with the proton radius. The analysis of the K+-d correlation shows that the relative distances at which deuterons and protons or kaons are produced are around 2 fm. The analysis of the p-d correlation shows that only a full three-body calculation that accounts for the internal structure of the deuteron can explain the data. In particular, the sensitivity of the observable to the short-range part of the interaction is demonstrated. These results indicate that correlations involving light nuclei in pp collisions at the LHC will also provide access to any three-body system in the strange and charm sectors. © 2024 American Physical Society. All rights reserved.

Department/s

  • Particle and nuclear physics

Publishing year

2024

Language

English

Publication/Series

Physical Review X

Volume

14

Issue

3

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Keywords

  • Atoms
  • Colliding beam accelerators
  • Photons
  • Protons
  • Atomic nucleus
  • Large Hadron Collider
  • Large-hadron colliders
  • Momentum spaces
  • Nuclear interaction
  • Property
  • Proton proton collisions
  • Space between
  • Strong interaction
  • Three-body systems
  • Hadrons

Status

Published

ISBN/ISSN/Other

  • ISSN: 2160-3308