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Peter Christiansen Profile

Peter Christiansen

Professor

Peter Christiansen Profile

Unveiling the strong interaction among hadrons at the LHC

Author

  • S Acharya
  • Jonatan Adolfsson
  • Peter Christiansen
  • Oliver Matonoha
  • Adrian Nassirpour
  • Alice Ohlson
  • Anders Oskarsson
  • Tuva Richert
  • Omar Vazquez Rueda
  • David Silvermyr
  • Evert Stenlund
  • N Zurlo
Show all

Summary, in English

One of the key challenges for nuclear physics today is to understand from first principles the effective interaction between hadrons with different quark content. First successes have been achieved using techniques that solve the dynamics of quarks and gluons on discrete space-time lattices1,2. Experimentally, the dynamics of the strong interaction have been studied by scattering hadrons off each other. Such scattering experiments are difficult or impossible for unstable hadrons3–6 and so high-quality measurements exist only for hadrons containing up and down quarks7. Here we demonstrate that measuring correlations in the momentum space between hadron pairs8–12 produced in ultrarelativistic proton–proton collisions at the CERN Large Hadron Collider (LHC) provides a precise method with which to obtain the missing information on the interaction dynamics between any pair of unstable hadrons. Specifically, we discuss the case of the interaction of baryons containing strange quarks (hyperons). We demonstrate how, using precision measurements of proton–omega baryon correlations, the effect of the strong interaction for this hadron–hadron pair can be studied with precision similar to, and compared with, predictions from lattice calculations13,14. The large number of hyperons identified in proton–proton collisions at the LHC, together with accurate modelling15 of the small (approximately one femtometre) inter-particle distance and exact predictions for the correlation functions, enables a detailed determination of the short-range part of the nucleon-hyperon interaction. © 2020, The Author(s).

Department/s

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

Publishing year

2020

Language

English

Pages

232-238

Publication/Series

Nature

Volume

588

Issue

7837

Document type

Journal article

Publisher

Nature Publishing Group

Topic

  • Subatomic Physics

Keywords

  • energetics
  • equipment
  • equipment component
  • molecular analysis
  • momentum
  • physics
  • precision
  • scattering
  • article
  • baryon
  • calculation
  • correlation function
  • hadron
  • nucleon
  • prediction
  • quark

Status

Published

ISBN/ISSN/Other

  • ISSN: 0028-0836