Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-09-02
Phys.Rev.D80:055015,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 8 figures, version to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.80.055015
We present the light-cone distribution amplitudes of the Xi baryons up to twist six on the basis of QCD conformal partial wave expansion to the leading order conformal spin accuracy. The nonperturbative parameters relevant to the DAs are determined in the framework of the QCD sum rule. The light-cone QCD sum rule approach is used to investigate both the electromagnetic form factors of Xi and the exclusive semileptonic decay of Xi_c as applications. Our estimations on the magnetic moments are $\mu_{\Xi^0}=-(1.92\pm0.34)\mu_N$ and $\mu_{\Xi^-}=-(1.19\pm0.03)\mu_N$. The decay width of the process Xi_c->Xi e^+\nu_e is evaluated to be $\Gamma=8.73\times10^{-14}{GeV}$, which is in accordance with the experimental measurements and other theoretical approaches.
Huang Ming-Qiu
Liu Yong-Lu
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