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Article overview
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Investigation of the $X(5568)$ as a fully open-flavor $suar bar d$ tetraquark state | | Wei Chen
; Hua-Xing Chen
; Xiang Liu
; T. G. Steele
; Shi-Lin Zhu
; | | Date: |
29 Feb 2016 | | Abstract: | We investigate the newly observed charged $X(5568)$ meson as an exotic
open-flavor tetraquark state $suar bar d$ with $J^P=0^+/1^+$ in the
framework of QCD sum rules. We use the color antisymmetric $[mathbf{ar
3_c}]_{su} otimes [mathbf{3_c}]_{ar{b}ar d}$ tetraquark currents in both
scalar and axial-vector channels to perform evaluations and numerical analyses.
Our results imply that the $X(5568)$ can be interpreted as both the scalar
$suar bar d$ tetraquark state and the axial-vector one, which are in good
agreement with the experiment observation. We also investigate the possible
decay patterns of the $X(5568)$ and suggest to search for its neutral partner
in the radiative decay into $B_s^0 gamma$ and $B_s^* gamma$, which can be
used to determine its spin-parity quantum numbers. Moreover, we predict its
charmed partner state around $2.55$ GeV with the quark content $suar car d$
and $J^P=0^+/1^+$. | | Source: | arXiv, 1602.8916 | | Services: | Forum | Review | PDF | Favorites | |
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