English

Looking for a vector charmonium-like state $Y$ in $e^{+}e^{-}\rightarrow\bar{D}D_{1}(2420)+c.c.$

High Energy Physics - Phenomenology 2020-10-28 v2 High Energy Physics - Experiment

Abstract

Inspired by the first observation of a vector charmonium-like state Y(4626)Y(4626) decaying to a meson pair Ds+Ds1(2536)D_{s}^{+}D_{s1}(2536)^{-}, which could be viewed as a PP-wave scalar-scalar [cs][cˉsˉ][cs][\bar{c}\bar{s}] tetraquark state, we predict a potential vector charmonium-like state YY with PP-wave scalar-scalar [cq][cˉqˉ][cq][\bar{c}\bar{q}] configuration. The corresponding mass spectrum of YY state is calculated to be 4.330.23+0.16 \mboxGeV4.33^{+0.16}_{-0.23}~\mbox{GeV} in the framework of QCD sum rules. We suggest that the predicted YY state could be looked for in an open-charm e+eDˉD1(2420)+c.c.e^{+}e^{-}\rightarrow\bar{D}D_{1}(2420)+c.c. process.

Keywords

Cite

@article{arxiv.2008.04603,
  title  = {Looking for a vector charmonium-like state $Y$ in $e^{+}e^{-}\rightarrow\bar{D}D_{1}(2420)+c.c.$},
  author = {Jian-Rong Zhang},
  journal= {arXiv preprint arXiv:2008.04603},
  year   = {2020}
}

Comments

7 pages, 4 figures; the version accepted for publication in Phys. Rev. D

R2 v1 2026-06-23T17:46:24.076Z