论文标题
$λ_b\ to p，n^\ ast（1535）$ from qcd轻单和规则的形式
$Λ_b \to p, N^\ast(1535)$ Form Factors from QCD Light-Cone Sum Rules
论文作者
论文摘要
在这项工作中，我们计算出$λ_b$衰减到质子的过渡形式，$ n^*（1535）$（$ j^p = {1/2}^+$和$ {1/2}^ - $分别在带有分布分配amplitudes amplitudes amplitudes amplitudes amplitudes amplitudes（das）的框架内。在相关函数的强烈表示中，我们同时隔离了质子和$ n^*（1535）$状态，以便可以同时评估$λ_b\ rightArrow p，n^*（1535）$。由于重子的鲜为人知的特性，我们研究了$λ_b$的DAS的三个插值电流和五个参数化模型。从数字上讲，我们对$λ_B\ rightArrow p $形式的预测以及$λ_b\ $λ_b\ to p \ellν$的分支分数与晶格模拟以及$ baryon总和的结果一致，以及$ baryon总和的结果，以及$ br的实验数据（$λ_b^0 \ bar n- prent）。关于$λ_b\ rightarrow n^*（1535）$的形式因素的预测非常敏感，因此相关测量值可能有助于阐明巴里子的特性。
In this work we calculate the transition form factors of $Λ_b$ decaying into proton and $N^*(1535)$ ($J^P={1/2}^+$ and ${1/2}^-$ respectively), within the framework of light-cone sum rules with the distribution amplitudes (DAs) of $Λ_b$-baryon. In the hadronic representation of the correlation function, we have isolated both the proton and the $N^*(1535)$ states so that the $Λ_b \rightarrow p, N^*(1535)$ form factors can be evaluated simultaneously. Due to the less known properties of baryons, we investigate three interpolating currents of the light baryons and five parametrization models for DAs of $Λ_b $. Numerically, our predictions on the $Λ_b \rightarrow p$ form factors and the branching fractions of $Λ_b\to p\ell ν$ from the Ioffe or the tensor currents are consistent with the Lattice simulation and the results from the light-baryon sum rules, as well as the experimental data of $Br(Λ_b^0\to pμ^-\barν)$. The predictions on the form factors of $Λ_b \rightarrow N^*(1535)$ are very sensitive to the choice of the interpolating currents so that the relevant measurement could be helpful to clarify the properties of baryons.
