Could $Z_{c}(4025)$ be a $J^{P}=1^{+}$ $D^{*}\bar{D^{*}}$ molecular state?

Chun-Yu Cui; Yong-Lu Liu; Ming-Qiu Huang

doi:10.1140/epjc/s10052-013-2661-x

Could $Z_{c}(4025)$ be a $J^{P}=1^{+}$ $D^{}\bar{D^{}}$ molecular state?

High Energy Physics - Phenomenology 2014-03-19 v2

Authors: Chun-Yu Cui , Yong-Lu Liu , Ming-Qiu Huang

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Abstract

We investigate whether the newly observed narrow resonance $Z_{c}(4025)$ can be described as a $D^{*}\bar{D^{*}}$ molecular state with quantum numbers $J^{P}=1^{+}$ . Using QCD sum rules, we consider contributions up to dimension six in the operator product expansion and work at leading order of $\alpha_{s}$ . The mass obtained for this state is $(4.05\pm 0.28) \mbox{GeV}$ . It is concluded that $D^{*}\bar{D^{*}}$ molecular state is a possible candidate for $Z_{c}(4025)$ .

Keywords

$Z_{c}(4025)$ $D^{*}\bar{D^{*}}$ molecular state QCD sum rules operator product expansion narrow resonance quantum numbers

Cite

@article{arxiv.1308.3625,
  title  = {Could $Z_{c}(4025)$ be a $J^{P}=1^{+}$ $D^{*}\bar{D^{*}}$ molecular state?},
  author = {Chun-Yu Cui and Yong-Lu Liu and Ming-Qiu Huang},
  journal= {arXiv preprint arXiv:1308.3625},
  year   = {2014}
}

Comments

7 pages, 4 figures.Published in Eur.Phys.J. C73 (2013) 2661. arXiv admin note: text overlap with arXiv:1304.1850