A QCD sum rule calculation of the $X^{\pm }(5568)\to B_s^0{\pi }^{\pm }$ decay width

Abstract

To understand the nature of the $X(5568)$, recently observed in the mass spectrum of the $B_s^0{\pi }^{\pm }$ system by the D0 Collaboration, we have investigated, in a previous work, a scalar tetraquark (diquak-antidiquark) structure for it, within the two-point QCD sum rules method. The result found for its mass agrees well with the experimental value. Encouraged by this finding we now extend our calculations to obtain the decay width of $X(5568)$ to $B_s^0{\pi }^{\pm }$ using the three-point QCD sum rule. We obtain a value of $(20.4\pm8.7)\MeV$, which, on comparing with the experimental value of $21.9\pm6.4 (\mbox{sta})^{+5.0}_{-2.5}(\mbox{syst}) \MeV/c^2$, reinforces the scalar four quark nature of $X(5568)$.

arXiv commentMinor modifications made. Some new discussions and references added

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Cited by in corpus (38)

• The $XYZ$ states: experimental and theoretical status and perspectives
• A review of the open charm and open bottom systems
• Exotic Hadrons from Heavy Ion Collisions
• Heavy-flavored tetraquark states with the $QQ\bar{Q}\bar{Q}$ configuration
• QCD Sum Rules Approach to the $X,Y$ and $Z$ States
• Open charm and bottom tetraquarks in an extended relativized quark model
• Spectrum and rearrangement decays of tetraquark states with four different flavors
• Four-quark structure of Zc(3900), Z(4430) and Xb(5568) states
• The decay width of the $Z_c(3900)$ as an axialvector tetraquark state in solid quark-hadron duality
• Analysis of the $X(5568)$ as scalar tetraquark state in the diquark-antidiquark model with QCD sum rules
• Tetraquark States with Open Flavors
• Is the exotic $X(5568)$ a bound state?
• Triply heavy tetraquark states with the $QQ\bar{Q}\bar{q}$ configuration
• Open-flavor charmed/bottom $sq\bar{q}\bar{Q}$ and $qq\bar{q}\bar{Q}$ tetraquark states
• Masses of open charm and bottom tetraquark states in a relativized quark model
• Is the newly reported $X(5568)$ a $B\bar{K}$ molecular state?
• Application of the QCD light cone sum rule to tetraquarks: the strong vertices $X_b{X}_b\rho$ and $X_c{X}_c\rho$
• X(5568) as a $su\bar{d}\bar{b}$ tetraquark in a simple quark model
• Where does the X(5568) structure come from?
• The decays of the fully open flavor state $T_{c\bar{s}0}^0$ in a $D^{\ast }{K}^{\ast }$ molecule scenario
• Possible $B^{(\ast )}\bar{K}$ hadronic molecule state
• $B_s\pi$--$B\bar{K}$ interactions in finite volume and the $X(5568)$
• Production of Charmed Tetraquarks from $B_c$ and $B$ decays
• Large production rate of new $B_s^0{\pi }^{\pm }$ and $D_s^{\pm }{\pi }^{\pm }$ states in high energy multi-production process
• Testing the doubly charged charm-strange tetraquarks
• Investigating tetraquarks composed of $us\bar{d}\bar{b}$ and $ud\bar{s}\bar{b}$
• Estimating decay rate of $X^{\pm }(5568)\to B_s{\pi }^{\pm }$ while assuming them to be molecular states
• Resonance $X(5568)$ as an exotic axial-vector state
• Study of X(5568) in a unitary coupled-channel approximation of $B\bar{K}$ and $B_s\pi$
• Probing an axial-vector tetraquark $Z_s$ via its semileptonic decay $Z_s\to X(4274)\overline{l}{\nu }_l$
• Exploring the mass spectrum and the electromagnetic properties of the possible ${\Xi }_{cc}{K}^{(\ast )}$ and ${\Xi }_{cc}{\bar{K}}^{(\ast )}$ molecules
• The bottomed strange molecules with isospin 0
• Magnetic moment of $X_Q$ state with $J^{PC}=1^{+\pm }$ in light cone QCD sum rules
• How can $X^{\pm }(5568)$ escape detection?
• Mass Spectrum of Exotic X(5568) State via Artificial Neural Network
• Studying the bound state of the $B\bar{K}$ system in the Bethe-Salpeter formalism
• On the description of exotic hadron states within QCD sum rules
• On properties of the exotic hadrons from QCD sum rules