Mechanisms of the Reaction π^-p→ a⁰₀(980)n→π⁰ηn at High Energies

1997/10/30 by N. N. Achasov, Achasov, N. N., G. N. Shestakov +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9710537

Talk given at HADRON'97

arxiv created 1997/10/30 · openalex publication_date 1997/10/30 · arxiv updated 2009/11/30 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

Over the last twenty years, it was assumed that the reaction π^-p→ a⁰₀(980)n→π⁰ηn at high energies is dominated by b₁ Regge pole exchange. We show that the new Brookhaven and Serpukhov data on the t distributions for this reaction can be explained within the framework of the Regge pole model only if the ρ₂ Regge pole exchange conspiring with its daughter plays a crucial role. The tentative estimates of the absolute π^-p→ a⁰₀(980)n→π⁰ηn reaction cross section are obtained. The contributions of the one-pion exchange mechanism and the Regge cuts are also estimated.

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