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Direct X(3872) production in e+e- collisions

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arxiv 1405.3404 v2 pith:VGJ73GPD submitted 2014-05-14 hep-ph hep-exnucl-th

A. Denig , Feng-Kun Guo , C. Hanhart , A.V. Nefediev This is my paper · ORCID
classification hep-phhep-exnucl-th
keywords collisionsdirectproductionwidthagreementappliedapproachbriefly
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abstract

Direct production of the charmonium-like state $X(3872)$ in $e^+e^-$ collisions is considered in the framework of the vector meson dominance model. An order-of-magnitude estimate for the width $\Gamma(X\to e^+e^-)$ is found to be $\gtrsim$0.03 eV. The same approach applied to the $\chi_{c1}$ charmonium decay predicts the corresponding width of the order 0.1 eV in agreement with earlier estimates. Experimental perspectives for the direct production of the $1^{++}$ charmonia in $e^+e^-$ collisions are briefly discussed.

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  1. A tale of Bethe logarithms: leptonic widths of $\chi_{cJ}$ and Lamb shift

    hep-ph 2024-11 conditional novelty 7.0 of 10

    The infrared divergence in chi_cJ to e+e- decays is canceled by adding the next-to-leading Fock component, yielding finite, scale-independent leptonic width predictions expressed through Bethe logarithms.

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