Light tetraquark state candidates

Abstract

In this article, we study the axialvector-diquark-axialvector-antidiquark type scalar, axialvector, tensor and vector $ss\bar{s}\bar{s}$ tetraquark states with the QCD sum rules. The predicted mass $m_X=2.08\pm 0.12\mathrm{GeV}$ for the axialvector tetraquark state is in excellent agreement with the experimental value $(2062.8\pm 13.1\pm 4.2)\mathrm{MeV}$ from the BESIII collaboration and supports assigning the new $X$ state to be a $ss\bar{s}\bar{s}$ tetraquark state with $J^{PC}=1^{+-}$. The predicted mass $m_X=3.08\pm 0.11\mathrm{GeV}$ disfavors assigning the $\varphi (2170)$ or $Y(2175)$ to be the vector partner of the new $X$ state. As a byproduct, we obtain the masses of the corresponding $qq\bar{q}\bar{q}$ tetraquark states. The light tetraquark states lie in the region about $2\mathrm{GeV}$ rather than $1\mathrm{GeV}$.

9 pages, 6 figures

References in corpus (6)

• Analysis of Y(2175) as a tetraquark state with QCD sum rules
• Analysis of the $Z(4430)$ as the first radial excitation of the $Z_c(3900)$
• QCD sum rule studies on the $ss\bar{s}\bar{s}$ tetraquark states with $J^{PC}=1^{+-}$
• Reanalysis of the $X(3915)$, $X(4500)$ and $X(4700)$ with QCD sum rules
• Observation and study of the decay $J/\psi \to \varphi \eta {\eta }^{\prime }$
• Studying $X(2100)$ hadronic decays and predicting its pion and kaon induced productions

Cited by in corpus (6)

• Fully-strange tetraquark $ss\bar{s}\bar{s}$ spectrum and possible experimental evidence
• $S$- and $P$-wave fully-strange tetraquark states from QCD sum rules
• Fully strange tetraquark resonant states as the cousins of $X(6900)$
• Investigation of Mass and Decay Characteristics of the All-light Tetraquark
• The fully-light vector tetraquark states with explicit P-wave via the QCD sum rules
• Light tetraquark states with exotic quantum numbers $J^{PC}=2^{+-}$