Probing the structure of the [formula omitted] and X(3872) states through correlation functions.
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| Title: | Probing the structure of the [formula omitted] and X(3872) states through correlation functions. |
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| Authors: | Shen, Yi-bo1 (AUTHOR), Liu, Zhi-Wei1 (AUTHOR), Lu, Jun-Xu1 (AUTHOR), Liu, Ming-Zhu1,2,3 (AUTHOR) liumz@lzu.edu.cn, Geng, Li-Sheng1,4,5,6,7 (AUTHOR) lisheng.geng@buaa.edu.cn |
| Source: | Physics Letters B. Jul2026, Vol. 878, pN.PAG-N.PAG. 1p. |
| Subjects: | Hadron interactions, Particle scattering functions, Scientific method, Hadrons, Quasi bound states |
| Abstract: | Over the past 20 years, many new hadron states have been discovered, but understanding their nature remains a key experimental and theoretical challenge. Recent studies have established that hadron-hadron interactions primarily govern the generation of new hadronic states, with their spectroscopy serving as a powerful tool for probing these interactions and determining the corresponding compositeness. In this work, we study four scenarios to determine the DK interaction by reproducing the mass of the D s 0 * (2317) , i.e., assuming the D s 0 * (2317) as a DK molecule, a mixture of a DK molecule and a bare state, a D K − D s η molecule, and a mixture of a D K − D s η molecule and a bare state. Using the D 0 K + interactions derived from these scenarios, we predict the D 0 K + correlation functions. Our results demonstrate that the lineshape of the D 0 K + correlation function is sensitive to the admixture effects from the coupled-channel D + K 0 and the bare state. Furthermore, we find that the D 0 K + correlation function can probe the position of the bare state, if such a QCD bare state exists. Using the shallow-bound state candidate X (3872) as input, we study the D 0 D ¯ * 0 correlation functions. These functions are highly sensitive to short-range dynamics and bare-state admixtures, resulting in clearly distinguishable correlation-function line shapes across different values of compositeness. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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