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  • Open Access

Hidden charmed decays of X(3872) within the DD¯* molecular framework

Hao-Dong Cai1, Zhao-Sai Jia1,2, Gang Li1,*, and Shi-Dong Liu1,†

  • *Contact author: gli@qfnu.edu.cn
  • †Contact author: liusd@qfnu.edu.cn
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Phys. Rev. D 111, 114024 – Published 20 June, 2025

DOI: https://doi.org/10.1103/gn25-fc9q

Abstract

The dipionic transition of the X(3872) to the ηc was investigated using an effective Lagrangian approach. In this study, the X(3872) was assumed to be a DD¯*+c.c. bound state with the quantum numbers JPC=1++ and to decay via triangle and box loops. It is found that the partial decay widths arising from the box loops are one order of magnitude greater than those from the triangle ones. The decay widths are model-dependent, as characterized by the cutoff parameter introduced in the form factor. Moreover, the charged and neutral DD¯* configurations of the X(3872) and its mass also influence the decay widths. With our model parameters, the decay widths for the X(3872)→π+π−ηc can reach up to several tens of keV. We hope that the current calculations within the molecular interpretation will be helpful for the future experiments.

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Phys. Rev. D 111, 114024– Published 20 June, 2025
  • Received 27 April 2025
  • Accepted 9 June 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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