2020/04/03 by W. J. Briscoe, Briscoe, W. J., A. E. Kudryavtsev +7 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2004.01742
openalex publication_date 2020/04/03 · openalex created_date 2020/04/10 · openalex updated_date 2026/07/28
Recent data from the PIONS@MAX-lab Collaboration, measuring the total cross section of the pion incoherent photoproduction γd→π-pp near threshold, have been used to extract the E0+ multipole and total cross section of the reaction γn → π-p, also near threshold. These are the first measurements of the reaction γd→π-pp in the threshold region. The value of E0+ is extracted through a fit to the deuteron data in a photoproduction model accounting for final-state interactions. The model takes an S-wave approximation for the elementary reaction γn → π-p with E0+ = const in the threshold region. The obtained value E0+ = -31.86± 0.8 (in 10-3/mπ+ units) is in agreement with other existing results. Model predictions for the total cross section σ(γn → π-p) are also given.