$B_s^{\ast }BK$ vertex from QCD sum rules

Abstract

The form factors and the coupling constant of the $B_s^{\ast }BK$ vertex are calculated using the QCD sum rules method. Three point correlation functions are computed considering both $K$ and $B$ mesons off-shell and, after an extrapolation of the QCDSR results, we obtain the coupling constant of the vertex. We study the uncertainties in our result by calculating a third form factor obtained when the $B_s^{\ast }$ is the off-shell meson, considering other acceptable structures and computing the variations of the sum rules' parameters. The form factors obtained have different behaviors but their simultaneous extrapolations reach to the same value of the coupling constant $g_{B_s^{\ast }BK}=10.6\pm 1.7$. We compare our result with other theoretical estimates.

11 pages, 11 figures

References in corpus (8)

• Analysis of the vertices $D^{\ast }{D}_{s}K$, $D_s^{\ast }DK$,$D_0{D}_{s}K$ and $D_{s0}DK$ with the light-cone QCD sum rules
• Molecular structure of the Bs0*(5725) and Bs1(5778) bottom-strange mesons
• ρD^*D^* vertex from QCD sum rules
• Strong D* -> D+pi and B* -> B+pi couplings
• $D^{\ast }{D}_{s}K$ and $D_s^{\ast }DK$ vertices in a QCD Sum Rule approach
• Analysis of the vertices D^*D^* P, D^*D V and DDV with light-cone QCD sum rules
• Analysis of the vertices $DDV$ and $D^{\ast }DV$ with light-cone QCD sum rules
• Strong coupling constants of bottom and charmed mesons with scalar, pseudoscalar and axial vector kaons

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