Further insights into the "ρπ puzzle"

2008/12/22 by Gang Li, Zhao, Qiang, Li, Gang +2
Computer Science · #Image Retrieval and Classification Techniques #Computability, Logic, AI Algorithms #Digital Image Processing Techniques

paper · doi:10.48550/arxiv.0812.4092

Abstract

Based on a systematic investigation of J/ψ(ψ^′)→ VP, where V and P stand for light vector and pseudoscalar mesons, we identify the role played by the electromagnetic (EM) transitions and intermediate meson loop transitions, which are essential ingredients for understanding the J/ψ and ψ^′ couplings to VP. We show that on the one hand, the EM transitions have relatively larger interferences in ψ^′→ ρπ and K^*K+c.c. as explicitly shown by vector meson dominance (VMD). On the other hand, the strong decay of ψ^′ receives relatively larger destructive interferences from the intermediate meson loop transitions. By identifying these mechanisms in an overall study of J/ψ(ψ^′)→ VP, we provide a coherent understanding of the so-called "ρπ puzzle".

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