论文标题
$ξ_c\ toξ\ ell^+ en^+ en^+ ell $的半衰减QCD总规则
Semileptonic Decay of $Ξ_c \to Ξ\ell^+ ν_\ell$ From Light-Cone QCD Sum Rules
论文作者
论文摘要
$ξ_c\ toξ\ellν_\ ell $的半衰减过程由本文中的Light-Cone QCD Sum规则研究。 $ξ_c\ toξ$半蛋白质过渡矩阵元素的六个形式是通过此方法计算的，其轻锥分布振幅为$ξ$ baryon，最高为twist Six。使用六个形式，$ξ_c^0 \至ξ^ - \ ell^+ en^+ en $的绝对分支比率和$ξ_c^+ \ to end \ eeld^0 \ ell^+ en^+ v n \ ell $是由螺旋型差异型脱发decay depay depay depay宽度的螺旋性扩增的形式化计算得出的。电子和MUON最终状态过程的绝对分支比率的比率给出了Lepton风味普遍性的证明。我们的结果符合最近的实验和理论报告。
Semileptonic decay processes of $Ξ_c \to Ξ\ellν_\ell$ are studied by light-cone QCD sum rules in this paper. The six form factors of $Ξ_c \to Ξ$ semileptonic transition matrix elements are calculated by this method with the light-cone distribution amplitudes of $Ξ$ baryon up to twist six. With the six form factors, the absolute branching ratios of $Ξ_c^0 \to Ξ^- \ell^+ ν_\ell$ and $Ξ_c^+ \to Ξ^0 \ell^+ ν_\ell$ are calculated by the helicity amplitudes formalism of semileptonic differential decay widths. The ratios of absolute branching ratios of electron and muon final states processes give the proof of lepton flavor universality. Our results are in accordance with the recent experimental and theoretical reports.
