χPT Calculations with two-pion Loops for S-wave π⁰ Production in pp Collision

1998/03/09 by E.V. Gedalin, E. Gedalin, Gedalin, E. +4
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.48550/arxiv.nucl-th/9803029

REVTeX, graphicx, 12 pages (including 4 figures)

arxiv created 1998/03/09 · openalex publication_date 1998/03/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The total cross section for the pp → pp π⁰ reaction at energies close to threshold is calculated within the frame of a chiral perturbation theory, taking into account tree and one loop diagrams up to chiral order D=2. Two-pion loop contributions dominate π⁰ production at threshold. The calculated cross section reproduces data, both scale and energy dependence, fairly well.

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