论文标题
$λ_b^0 \ to pk^ - \ ell^+\ ell^ - $衰减包含$λ$共振的$λ_b^0 \的角度分布，最多可旋转到$ \ leq5/2 $
Angular distribution of $Λ_b^0\to pK^-\ell^+\ell^-$ decays comprising $Λ$ resonances with spin up to $\leq5/2$
论文作者
论文摘要
本文描述了$λ_b^0 \toλ（\ to pk^ - ）\ ell^+\ ell^ - $衰减的角度分布。对于多个干扰旋转状态的旋转$ \ leq \ tfrac {5} {2} $的旋转状态的情况给出了完整的表达。此分布与$λ_b^0 \ to pk^ - \ ell^+\ ell^ - $衰减的将来的测量相关，在这种情况下，仅根据其质量，不同的状态无法轻易分离。考虑旋转时会出现新的观察值 - $ \ tfrac {5} {2} $状态以及状态之间的干扰。对它们对各种标准模型场景的行为的探索表明，其中一些可观察到的物品对$ b \涉及的Wilson系数表现出有趣的敏感性，以$ b \ to s \ ell^+\ ell^ - $ $ transitions。其他对威尔逊系数不敏感，可用于验证$λ_b^0 \toλ$形式因子的描述。还提供了一个可以用于确定本文中对实验数据分析中所述的所有角度可观察物的基础。
This paper describes the angular distribution of $Λ_b^0\to Λ(\to pK^-)\ell^+\ell^-$ decays. A full expression is given for the case of multiple interfering spin-states with spin $\leq \tfrac{5}{2}$. This distribution is relevant for future measurements of $Λ_b^0\to pK^-\ell^+\ell^-$ decays, where different states cannot easily be separated based on their mass alone. New observables arise when considering spin-$\tfrac{5}{2}$ states as well as interference between states. An exploration of their behaviour for a variety of beyond the Standard Model scenarios shows that some of these observables exhibit interesting sensitivity to the Wilson coefficients involved in $b\to s\ell^+\ell^-$ transitions. Others are insensitive to the Wilson coefficients and can be used to verify the description of $Λ_b^0\to Λ$ form-factors. A basis of weighting functions that can be used to determine all of the angular observables described in this paper in a moment analysis of the experimental data is also provided.
