Light Quark Dependence of the Isgur-Wise Function from QCD Sum rules

Details Light Quark Dependence of the Isgur-Wise Function from QCD Sum rules Light Quark Dependence of the Isgur-Wise Function from QCD Sum rules

1994-08-16

arxiv.org/abs/hep-ph/9408303v2

Phys.Rev.D50:5775-5780,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 Pages latex, 9 figures available upon request

Scientific paper

10.1103/PhysRevD.50.5775

We study light quark dependence of the Isgur-Wise function for $B_a\rightarrow D_a$ and $B_a\rightarrow D^{*}_a$ in the framework of QCD sum rules. At zero recoil , all the Isgur-Wise functions equal as required by heavy quark symmetry and at non-zero recoil, the Isgur-Wise function for $B_s$ decay falls faster than that for $B_{u,d}$ decay , which is just contrary to the recent prediction of the heavy meson chiral perturbation theory. As by-products, we also estimate SU(3) breaking effects in the mass and the decay constant.

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