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arXiv · 0902.1300

Towards a dynamical understanding of the non-$D \bar D$ decay of $ψ(3770)$

Yuan-Jiang Zhang·Gang Li·Qiang Zhao
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Abstract

We investigate the $ψ(3770)$ non-$D\bar{D}$ decays into $VP$, where $V$ and $P$ denote vector and pseudoscalar mesons, respectively, via OZI-rule-evading intermediate meson rescatterings in an effective Lagrangian theory. By identifying the leading meson loop transitions and constraining the model parameters with the available experimental data for $ψ(3770)\to J/ψη$, $ϕη$ and $ρπ$, we succeed in making a quantitative prediction for all $ψ(3770)\to VP$ with $BR_{VP}$ from 0.41% to 0.64%. It indicates that the OZI-rule-evading long-range interactions are still playing a role in $ψ(3770)$ strong decays, and could be a key towards a full understanding of the mysterious $ψ(3770)$ non-$D\bar{D}$ decay mechanism.

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Yuan-Jiang Zhang, Gang Li, Qiang Zhao. 2009-04-20. Towards a dynamical understanding of the non-$D \bar D$ decay of $ψ(3770)$. https://doi.org/10.1103/physrevlett.102.172001

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