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Peter Christiansen Profile

Peter Christiansen

Professor

Peter Christiansen Profile

Extending the ALICE strong-interaction studies to nuclei: measurement of proton-deuteron correlations in pp collisions at √s = 13 TeV

Author

  • S. Acharya
  • S. Basu
  • P. Christiansen
  • O. Matonoha
  • A.F. Nassirpour
  • A. Ohlson
  • A. Oskarsson
  • T. Richert
  • O.V. Rueda
  • D. Silvermyr
  • N. Zurlo
Show all

Summary, in English

The large data sample of high-multiplicity pp collisions collected by ALICE allows for the precise measurement of the size of source producing primary hadrons, opening the doors to a study of the interaction of different hadron species using femtoscopy techniques. The momentum correlation between (anti)protons and (anti)deuterons measured in pp collisions at √s = 13 TeV with ALICE is studied here for the first time. The measured correlation function for ((equation presented))p-((equation presented))d pairs is compared with theoretical predictions obtained considering Coulomb and Coulomb plus strong interactions and employing the Lednický-Lyuboshitz model with scattering parameters extracted from traditional scattering experiments for the p-d system. The measured correlation function can not be reproduced by any of the obtained predictions. This deviation can to large extent be interpreted as a demonstration of the late formation time of (anti)deuterons in hadron-hadron collisions. This observation is key for the understanding of the production mechanism of light (anti)nuclei, which is an open issue in high-energy physics and has also important consequences for the study of antinuclei formation in the interstellar medium either from collisions triggered by high-energy cosmic rays or by dark matter decays. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration

Publishing year

2022

Language

English

Publication/Series

Proceedings of Science

Volume

398

Document type

Conference paper

Publisher

Sissa Medialab srl

Topic

  • Subatomic Physics

Keywords

  • Cosmology
  • Hadrons
  • Tellurium compounds
  • Anti-protons
  • Correlation function
  • Data sample
  • High multiplicity
  • Interaction studies
  • Large data
  • Measurements of
  • Momentum correlation
  • Precise measurements
  • Strong interaction
  • Deuterium

Conference name

The European Physical Society Conference on High Energy Physics

Conference date

2021-07-26 - 2021-07-30

Status

Published

ISBN/ISSN/Other

  • ISSN: 1824-8039