ar X iv : h ep - p h / 06 02 08 0 v 1 9 F eb 2 00 6 D s ( 2317 ) as a tetraquark state with QCD sum rules in heavy quark limit

v 2 2 5 M ar 2 00 6 D s 0 ( 2317 ) as a tetraquark state with QCD sum rules in heavy quark limit

In this article, we take the point of view that the charmed scalar meson Ds0(2317) be a tetraquark state and devote to calculate its mass within the framework of the QCD sum rules approach in the heavy quark limit. The numerical values for the mass of the Ds0(2317) are consistent with the experimental data, there must be some tetraquark component in the scalar meson Ds0(2317). Detailed discussi...

ar X iv : h ep - p h / 05 10 03 9 v 1 4 O ct 2 00 5 Strong decays of D sJ ( 2317 ) and D sJ ( 2460 )

With the identification of (DsJ (2317), DsJ (2460)) as the (0 , 1) doublet in the heavy quark effective field theory, we derive the light cone QCD sum rule for the coupling of eta meson with DsJ (2317)Ds and DsJ (2460)D ∗ s . Through η − π 0 mixing we calculate their pionic decay widths, which are consistent with the experimental values (or upper limits). Combining the radiative decay widths de...

ar X iv : h ep - p h / 06 08 21 3 v 1 1 8 A ug 2 00 6 Properties of D - Mesons from QCD Sum Rules with an improved spectral function

ar X iv : h ep - p h / 06 10 32 7 v 2 26 O ct 2 00 6 Contribution of DK Continuum in the QCD Sum Rule for D sJ ( 2317 )

Using the soft-pion theorem and the assumption of the dominance of the Ds(0 )DK coupling we include the contribution of DK continuum into the QCD Sum Rule for DsJ (2317). We find that this contribution can significantly lower the mass and decay constant of Ds(0 ) state. For the value of the pole mass Mc = 1.38 GeV we obtain the mass of D + s (0 ) M0 = 2.31± 0.03 GeV in the interval s0 = 7.0 − 8...

ar X iv : h ep - p h / 06 08 26 4 v 2 1 3 N ov 2 00 6 Semileptonic B s → D sJ ( 2460 ) lν decay in QCD

Using three point QCD sum rules method, the form factors relevant to the semileptonic Bs → DsJ(2460)lν decay are calculated. The q2 dependences of these form factors are evaluated and compared with the heavy quark effective theory predictions. The dependence of the asymmetry parameter α, characterizing the polarization ofDsJ meson, on q2 is studied. The branching ratio of this decay is also est...