Year: 2011
Type: article
Abstract: After constructing all the tetraquark interpolating currents with ${J}^{\mathrm{PC}}={1}^{\ensuremath{-}+}$, ${1}^{--}$, ${1}^{++}$ and ${1}^{+\ensuremath{-}}$ in a systematic way, we investigate the two-point correlation functions to extract the masses of the charmoniumlike states with QCD sum rule. For the ${1}^{--}$ $qc\overline{q}\overline{c}$ charmoniumlike state, ${m}_{X}=4.6\ensuremath{\sim}4.7\text{ }\text{ }\mathrm{GeV}$, which implies a possible tetraquark interpretation for the state $Y(4660)$. The masses for both the ${1}^{++}$ $qc\overline{q}\overline{c}$ and $sc\overline{s}\overline{c}$ charmoniumlike states are around $4.0\ensuremath{\sim}4.2\text{ }\text{ }\mathrm{GeV}$, which are slightly above the mass of $X(3872)$. For the ${1}^{\ensuremath{-}+}$ and ${1}^{+\ensuremath{-}}$ $qc\overline{q}\overline{c}$ charmoniumlike states, the extracted masses are around $4.5\ensuremath{\sim}4.7\text{ }\text{ }\mathrm{GeV}$ and $4.0\ensuremath{\sim}4.2\text{ }\text{ }\mathrm{GeV}$, respectively. As a by-product, the bottomoniumlike states are also studied. We also discuss the possible decay modes and experimental search of the charmoniumlike states.
Authors: Wei Chen, Shi-Lin Zhu
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W192473500