Year: 2025
Type: article
Abstract: The observation of X 0 ( 2900 ) in the B + → D + D − K + decay process indicates the existence of open flavor tetraquark states. We investigate the production and decay of the X 0 ( 2900 ) state with the final state interaction mechanism, where we calculate the strong vertices such as g D ¯ K X 0 , g D ¯ * K * X 0 , g D s * D ¯ K , and g D s 1 D ¯ K * in the framework of the QCD sum rule method. We find that for the interpretation of the D ¯ * K * molecule of X 0 ( 2900 ) , the branching fraction of the production process and the decay width are consistent with the experimental results, indicating that the observed X 0 ( 2900 ) could be interpreted as a D ¯ * K * molecule. However, we cannot exclude the possibility of a compact tetraquark interpretation within the uncertainty. More experimental and theoretical efforts are needed to fully understand the nature of the X 0 ( 2900 ) state.
Authors: Zi-Yan Yang, Qian Wang, Wei Chen
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4409922908