X(3872) as a four-quark state in a Dyson-Schwinger/Bethe-Salpeter approach
APS, 2019
Online
academicJournal
- 9
Zugriff:
We generalize the framework of Dyson-Schwinger and Bethe-Salpeter equations for four-quark states to accommodate the case of unequal quark masses. As a first application, we consider the quantum numbers I(JPC)=0(1++) of the X(3872) and study the four-quark states with quark contents cqq¯c¯ and css¯c¯. Their Bethe-Salpeter amplitudes are represented by a basis of heavy-light meson-meson, hadrocharmonium and diquark-antidiquark operators, which allows for a dynamical distinction between different internal configurations. In both cases we find the heavy-light meson-meson component to be dominant. For the putative X(3872) we obtain a mass of 3916(74) MeV; the corresponding css¯c¯ state is predicted at 4068(61) MeV.
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X(3872) as a four-quark state in a Dyson-Schwinger/Bethe-Salpeter approach
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Autor/in / Beteiligte Person: | Wallbott, Paul C. ; Eichmann, Gernot ; Fischer, Christian S. |
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Veröffentlichung: | APS, 2019 |
Medientyp: | academicJournal |
Umfang: | 9 |
DOI: | 10.1103/PhysRevD.100.014033 |
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