A walk through the world of chiral dynamics
Ulf-G. Mei{\ss}ner
TL;DR
This paper reviews the current understanding of hadron-hadron scattering lengths as probes of nonperturbative QCD, highlighting recent progress and future needs in theory, experiment, and lattice QCD to better understand chiral symmetry breaking.
Contribution
It provides a comprehensive overview of scattering processes sensitive to chiral symmetry breaking, emphasizing the interplay of theory, experiment, and lattice QCD, and outlines future research directions.
Findings
Progress in understanding pion-pion and pion-kaon scattering.
Insights into pion-nucleon and antikaon-nucleon interactions.
Identification of key challenges for future research.
Abstract
Hadron-hadron scattering lengths are fine probes of our understanding of nonperturbative QCD. I discuss the status of a variety of scattering processes sensitive to the spontaneous and explicit chiral symmetry breaking of QCD, such as pion-pion, pion-kaon, pion-nucleon, antikaon-nucleon and Goldstone boson scattering off D-mesons. The fruitful interplay of theory, experiment and lattice QCD is emphasized. I point out what has to be done in these fields to gain further insight into these fundamental parameters.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research