English

$Y(4260)$ as four-quark state

High Energy Physics - Phenomenology 2020-03-10 v1 Nuclear Theory

Abstract

We treat the Y(4260)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 DD and Dˉ1\bar D_1 quark currents or tetraquark one. In both cases we calculate the widths of decays Y(4260)Zc(3900)+πY(4260)\to Z_c(3900)+\pi and Y(4260)D()+Dˉ()Y(4260)\to D^{(\ast)}+\bar D^{(\ast)}. It is found that in both approches the mode YZc++πY\to Z^+_c + \pi^- is enhanced compared with the open charm modes. However the absolute value of the YZc++πY\to Z^+_c + \pi^- decay width obtained in molecular picture is arguably too large. On the other hand the value obtained in tetraquark picture is reasonable.

Keywords

Cite

@article{arxiv.2003.04142,
  title  = {$Y(4260)$ as four-quark state},
  author = {Anna Zuzana Dubnickova and Stanislav Dubnicka and Aidos Issadykov and Mikhail Alekseevich Ivanov and Andrej Liptaj},
  journal= {arXiv preprint arXiv:2003.04142},
  year   = {2020}
}

Comments

12 pages, 1 figure

R2 v1 2026-06-23T14:08:48.004Z