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Tetraquark state candidates: $Y(4140)$, $Y(4274)$ and $X(4350)$ by Wang, Zhi-Gang; Tian, Ye-Fan is a scholarly article available to read on EtoBox.

What is Tetraquark state candidates: $Y(4140)$, $Y(4274)$ and $X(4350)$ about?

In this article, we tentatively assign the $Y(4140)$, $Y(4274)$ and $X(4350)$ to be the scalar and tensor $cs\bar{c}\bar{s}$ tetraquark states, respectively, and study them with the QCD sum rules. In the operator product expansion, we take into account the vacuum condensates up to dimension-10. In calculations, we use the formula $\mu=\sqrt{M^2_{X/Y/Z}-(2{\mathbb{M}}_c)^2}$ to determine the energy scales of the QCD spectral densities. The numerical results favor assigning the $Y(4140)$ to be the $J^{PC}=2^{++}$ diquark-antidiquark type tetraquark state, and disfavor assigning the $Y(4274)$ and $X(4350)$ to be the $0^{++}$ or $2^{++}$ tetraquark states.

Author

Wang, Zhi-Gang; Tian, Ye-Fan

Published

2015

Language

EN