Calculation of mass and width of unstable molecular state using the developed Bethe-Salpeter theory
Applying the developed Bethe-Salpeter theory for dealing with resonance, we investigate the time evolution of molecular state composed of two vector mesons as determined by the total Hamiltonian. Then exotic meson resonance \(\chi_{c0}(3915)\) is considered as a mixed state of two unstable molecular...
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| creator | Chen, Xiaozhao Lü, Xiaofu Guo, Xiurong Shi, Zonghua Wang, Qingbiao |
| description | Applying the developed Bethe-Salpeter theory for dealing with resonance, we investigate the time evolution of molecular state composed of two vector mesons as determined by the total Hamiltonian. Then exotic meson resonance \(\chi_{c0}(3915)\) is considered as a mixed state of two unstable molecular states \(D^{*0}\bar{D}^{*0}\) and \(D^{*+}D^{*-}\), and the mass and width for physical resonance \(\chi_{c0}(3915)\) are calculated in the framework of relativistic quantum field theory. In this actual calculation, we minutely show how to obtain the correction for energy level of resonance and to exhibit the key features of dispersion relation in an extended Feynman diagram. The numerical results are consistent with the experimental values. |
| doi_str_mv | 10.48550/arxiv.2210.01563 |
| format | Article |
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Then exotic meson resonance \(\chi_{c0}(3915)\) is considered as a mixed state of two unstable molecular states \(D^{*0}\bar{D}^{*0}\) and \(D^{*+}D^{*-}\), and the mass and width for physical resonance \(\chi_{c0}(3915)\) are calculated in the framework of relativistic quantum field theory. In this actual calculation, we minutely show how to obtain the correction for energy level of resonance and to exhibit the key features of dispersion relation in an extended Feynman diagram. 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| subjects | Feynman diagrams Mathematical analysis Meson resonance Physics - High Energy Physics - Phenomenology Physics - High Energy Physics - Theory Quantum theory Relativistic theory Vector mesons |
| title | Calculation of mass and width of unstable molecular state using the developed Bethe-Salpeter theory |
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