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arXiv 1102.4245hep-ph
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$Ξ$重子电磁形状因子和半轻子衰变Xi_c->Xi e^+nu_e的光锥QCD求和规则方法

Light-cone QCD sum rule approach for the $Ξ$ baryon electromagnetic form factors and the semileptonic decay Xi_c->Xi e^+nu_e

Yong-lu Liu, Ming-qiu Huang

摘要:

在光锥QCD求和规则框架下,采用Ioffe型插值流,研究了Xi重子的电磁形状因子和半轻子衰变过程Xi_c->Xi e^+nu_e.我们对磁矩的估计为$ mu_{Xi^0} =-(1.75 \pm 0.21)μ N和mu_{Xi^-} =-(1.01 \pm 0.11)μ N.半轻子过程的衰变宽度为γ(γ_PDMATHABMP γ_e^+ν_e)=(6.17^{+2.24}-2.48})\times 10^{-14}GeV.结果表明,采用这种插值电流可以改善磁形状因子的计算,为半轻子衰变过程的分析提供更可靠的预测。

英文摘要:

The electromagnetic form factors of the Xi baryons and the semileptonic decay process Xi_c->Xi e^+nu_e are investigated in the frame work of the light-cone QCD sum rule method with Ioffe-type interpolating currents. Our estimates on the magnetic moments are $mu_{Xi^0}=-(1.75\pm0.21) mu_N and mu_{Xi^-}=-(1.01\pm0.11)mu_N. The decay width of the semileptonic process is expected to be Gamma(Ξ_c\to Ξe^+ν_e)=(6.17^{+2.24}_{-2.48})\times10^{-14}GeV. The results make sure that the adoption of this type interpolating current improve the calculations of the magnetic form factors and give more reliable prediction for the analysis of the semileptonic decay process.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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