Channel coupling in e+ e- annihilation into heavy meson pairs at the D* D* threshold

2006/02/26 by M.B. Voloshin, M. B. Voloshin, Voloshin, M. B. · 2 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0602233

10 pages, 2 figures

openalex publication_date 2006/02/26 · arxiv created 2006/03/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A threshold singularity in a heavier meson channel, e.g. D^* D^*, generally reflects in the amplitudes of e⁺e^- annihilation into lighter meson pairs, such as D^* D, D D, and D_s D_s, due to the channel coupling. The behavior of the cross section of the e⁺e^- annihilation into each channel in this situation is considered using general properties of the amplitudes near the new threshold. It is argued that the effects of the channel coupling can be quite significant in the observable cross section, in particular near the D^* D^* threshold.

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