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arXiv · 2405.16794

X(3872) revisited: the roles of OPEP and the quark degrees of freedom

Sachiko Takeuchi·Yasuhiro Yamaguchi·Atsushi Hosaka·Makoto Takizawa
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Abstract

The $X(3872)$ is investigated by employing the quark-hadron hybrid model, that consists of the $c\bar c$ core, $D^{(*)}\bar D{}^*$, $J/\psi\omega$, and $J/\psi\rho$ two-meson states. Due to the attraction from the $c\bar c$-$D\bar D{}^*$ coupling and from the OPEP tensor coupling, a very thin peak can appear at the $D^{0}\bar D{}^{*0}$ threshold. The energy of the corresponding pole of the scattering matrix is $E=(+0.06-0.14i)$ MeV, which is on the physical sheet and above the threshold, the same as the one of the poles from the LHCb data analysis.

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Sachiko Takeuchi, Yasuhiro Yamaguchi, Atsushi Hosaka, Makoto Takizawa. 2024-05-27. X(3872) revisited: the roles of OPEP and the quark degrees of freedom. https://doi.org/10.1007/s00601-021-01663-8

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