$(Q\bar{s})^{(*)}(\bar{Q}s)^{(*)}$ molecular states from QCD sum rules: a view on Y(4140)

Jian-Rong Zhang; Ming-Qiu Huang

doi:10.1088/0954-3899/37/2/025005

$(Q\bar{s})^{()}(\bar{Q}s)^{()}$ molecular states from QCD sum rules: a view on Y(4140)

High Energy Physics - Phenomenology 2010-01-21 v2

Authors: Jian-Rong Zhang , Ming-Qiu Huang

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Abstract

Masses for the $(Q\bar{s})^{(*)}(\bar{Q}s)^{(*)}$ ( $Q=c$ or $b$ ) molecular states are systematically computed in the framework of QCD sum rules. Technically, contributions of the operators up to dimension six are included in operator product expansion (OPE). The numerical result $4.13\pm0.10 {GeV}$ for $D_{s}^{*}\bar{D}_{s}^{*}$ agrees well with the mass $4143.0\pm2.9\pm1.2 {MeV}$ for Y(4140), which supports the $D_{s}^{*}\bar{D}_{s}^{*}$ molecular configuration for Y(4140).

Keywords

QCD sum rules molecular states Y(4140) D_s* anti-D_s* operator product expansion charmonium-like states exotic hadrons

Cite

@article{arxiv.0905.4178,
  title  = {$(Q\bar{s})^{(*)}(\bar{Q}s)^{(*)}$ molecular states from QCD sum rules: a view on Y(4140)},
  author = {Jian-Rong Zhang and Ming-Qiu Huang},
  journal= {arXiv preprint arXiv:0905.4178},
  year   = {2010}
}

Comments

8 pages, 6 figures