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Revisit the $X(4274)$ as the axialvector tetraquark state

Published 10 Dec 2018 in hep-ph | (1812.04503v4)

Abstract: In this article, we construct the $[sc]A[\bar{s}\bar{c}]_V-[sc]_V[\bar{s}\bar{c}]_A$ type tensor current to study the mass and width of the $X(4274)$ with the QCD sum rules in details. The predicted mass $M{X}=(4.27\pm0.09) \, \rm{GeV}$ for the $J{PC}=1{++}$ tetraquark state is in excellent agreement with the experimental data $4273.3 \pm 8.3 {+17.2}_{-3.6} \mbox MeV}$ from the LHCb collaboration. The central value of the width $\Gamma(X(4274)\to J/\psi \phi)=47.9\,{\rm{MeV}}$ is in excellent agreement with the experimental data $56 \pm 11 {+8}_{-11} \mbox MeV}}$ from the LHCb collaboration. The present work supports assigning the $X(4274)$ to be the $J{PC}=1{++}$ $[sc]_A[\bar{s}\bar{c}]_V-[sc]_V[\bar{s}\bar{c}]_A$ tetraquark state with a relative P-wave between the diquark and antidiquark constituents. Furthermore, we obtain the mass of the $[sc]_A[\bar{s}\bar{c}]_V-[sc]_V[\bar{s}\bar{c}]_A$ type tetraquark state with $J{PC}=1{-+}$ as a byproduct.

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