Testing axial and electromagnetic nucleon form factors in time-like regions in the processesp¯+n→π−+ℓ−+ℓ+andp¯+p→π0+ℓ−+ℓ+,ℓ=e,μ

2006/10/31 by C. Adamuščín, C. Adamuscin, E. A. Kuraev +4 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevc.75.045205

published as Phys.Rev.C75:045205,2007 · 23 pages, 9 figures

arxiv created 2006/10/31 · openalex publication_date 2007/04/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In the frame of a phenomenological approach based on Compton-like Feynman amplitudes, we study the annihilation channel in antiproton nucleon collisions with production of a single charged or neutral pion and a lepton-antilepton pair. These reactions allow us to access nucleon and axial electromagnetic form factors in the time-like region and offer a unique possibility to study the kinematical region below the two-nucleon threshold. The differential cross section in an experimental setup where the pion is fully detected is given with explicit dependence on the relevant nucleon form factors. The possibility of measuring a heavy charged pion in the annihilation channel is also discussed.

Citations

• Analytic Model for the QCD Running Coupling with Universalα¯s(0)Value
• Updated dispersion-theoretical analysis of the nucleon electromagnetic form factors
• Precision Rosenbluth Measurement of the Proton Elastic Form Factors
• Chiral Dynamics in Nucleons and Nuclei

Cited by

• Production of a pion in association with a high-Q2dilepton pair in antiproton-proton annihilation at GSI-FAIR
• Nucleon electromagnetic form factors in the timelike region