Work

Implication of a negative effective range on the D D ¯ * interaction and the nature of X ( 3872 )

Year: 2025

Type: article

Abstract: A recent analysis of the LHCb data [Esposito , ] obtained a sizable negative effective range for the X ( 3872 ) . This has attracted intensive discussions on whether X ( 3872 ) can be deemed as a D D ¯ * molecular state. This work explicitly demonstrates that the negative effective range of the X ( 3872 ) does not contradict the molecular picture, adopting an effective field theory formulation of the D D ¯ * interaction that can simultaneously reproduce the binding energy and effective range of the X ( 3872 ) . We elaborate on the implications of the large negative effective range of X ( 3872 ) and the small binding energy on the underlying D D ¯ * interaction. Such results are relevant for a better understanding of hadronic molecules and their binding mechanism.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.034001

Authors: Yi-Bo Shen, Ming-Zhu Liu, Zhi-Wei Liu, Li-Sheng Geng

Institutions: Beihang University, Lanzhou University, Chinese Academy of Sciences, Institute of Modern Physics

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation, National Key Research and Development Program of China