Y(4260) as a four-quark state

We treat the Y(4260) resonance as a four-quark state in the framework of the covariant confining quark model. We study two choices of the interpolating current, either the molecular-type current which effectively corresponds to the product of L) and D1 quark currents or tetraquark one. In both cases...

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Veröffentlicht in:Physical review. D 2020-05, Vol.101 (9), Article 094030
Hauptverfasser: Dubnicka, S., Dubnickova, A. Z., Issadykov, A., Ivanov, M. A., Liptaj, A.
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Sprache:eng
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Zusammenfassung:We treat the Y(4260) resonance as a four-quark state in the framework of the covariant confining quark model. We study two choices of the interpolating current, either the molecular-type current which effectively corresponds to the product of L) and D1 quark currents or tetraquark one. In both cases, we calculate the widths of decays Y(4260) -> 4(3900) + pi and Y(4260) ( D(*) ($) over bar(*). It is found that in both approaches the mode Y r is enhanced compared with the open -charm modes. However, the absolute value of the Y +>r decay width obtained in molecular picture is arguably too large. On the other hand, the value obtained in tetraquark picture is reasonable.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.101.094030