Quantum interference of - and -mesons in the reaction

2002/02/15 by M. F. M. Lutz, Matthias F.M. Lutz, Bengt Friman +3 · 29 citations
Physics and Astronomy · #Amplitude #Baryon #Coupling (piping) #Cross section (physics) #Energy (signal processing) #High-Energy Particle Collisions Research #Interference (communication) #Meson #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #nucl-th

paper · pdf · doi:10.1016/s0375-9474(02)01294-0

published in Nuclear Physics A 713(1-2), 97-118 (Elsevier BV) · 25 pages, 22 figures

arxiv created 2002/02/15 · openalex publication_date 2003/01/01 · arxiv updated 2010/12/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The study of the πN→ ρ⁰ N and πN → ωN amplitudes below and close to the vector meson production threshold (1.4<√ s <1.8 GeV)reveals a rich structure arising from the presence of baryon resonances in this energy range. These resonances are reflected in the interference pattern of the e⁺e^- decays of the ρ⁰- and ω-mesons produced in π^- p and π⁺ n reactions. We discuss the shape and magnitude of the ρ⁰-ω interference in the π^-p → e⁺e^- n and π⁺n → e⁺e^- p reaction cross sections as functions of the total center of mass energy √ s. We find contrasted results: the interference is largely destructive for the π^-p → e⁺e^- n cross section but constructive for the π⁺n → e⁺e^- p cross section. An experimental study of these reactions would provide significant constraints on the coupling of vector meson-nucleon channels to low-lying baryon resonances.

Citations

• Isoscalar-isovector interferences in πN↦Ne+e- reactions as a probe of baryon resonance dynamics
• What is the structure of the Roper resonance?
• Relativistic chiral SU(3) symmetry, large-Nc sum rules and meson–baryon scattering

Cited by

• Quantum interferences in the reaction close to the vector meson production threshold
• Polarization and dilepton anisotropy in pion–nucleon collisions