Exploring Efimov states in D^D^D^* and DD^D^ three-body systems

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2025年7月4日

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Hai-Long Fu,
Yong-Hui Lin,
Feng-Kun Guo,
Hans-Werner Hammer,
Ulf-G. Meißner,
Akaki Rusetsky,
Xu Zhang

摘要

The Efimov effect is an intriguing three-body quantum phenomenon. Searching for Efimov states within the realms of nuclear and hadronic physics presents a challenge due to the inherent inability of natural physical systems to exhibit adjustable two-body scattering lengths. In this study, we examine the potential existence of Efimov states in the D^*D^*D^* and DD^*D^* three-hadron systems. Utilizing a pionless effective field theory framework, we determine that the presence of Efimov states in the spectrum of the D^*D^*D^* system is contingent upon the existence of an (I, J) = (1, 2) D^*D^* two-body bound system. If only the $T_{cc}^{+}$ $ {T}_{cc}^{+} $ and its heavy quark spin partner $T_{cc}^{* +}$ $ {T}_{cc}^{\ast +} $ exist while there is no near-threshold pole in all other S-wave D^(*)D^* scattering amplitudes, no Efimov effect is expected in the D^(*)D^*D^* systems.

Exploring Efimov states in D*D*D* and DD*D* three-body systems

摘要

Exploring Efimov states in D^D^D^* and DD^D^ three-body systems