论文标题
在半乳房中探索新物理学
Probing new physics in semileptonic $Σ_b$ and $Ω_b$ decays
论文作者
论文摘要
最近，从中性电流（$ b \ to s l \ bar {l} $）和充电电流（$ b \ to c l \ bar \ bar {ν_{l}} $）过渡。受这些鼓舞人心的结果的动机，我们对巴属的分析衰减$ {σ_b} \ toσ_cl \ bar {ν_{ν_{l}} $和$ω_b\ \ toω_cl \ bar {ν_ \ bar {ν_{l}} $在夸克级别过渡，以在模型独立方法中仔细检查新物理（NP）的性质。我们首先使用$ \ Mathcal {b}（b \ to d^{（*）} l \ bar {ν_{l}}} $，$ {\ rm rm r} _ {d^{（*）} $ rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm rm，场景。使用受约束的NP耦合参数，我们报告与与过程相关的各种可观察结果报告的数值结果前后不对称，强子和Lepton纵向极化不对称和凸参数。我们还提供了这些可观察到的$ q^2 $依赖关系，我们希望这项工作中相应的数值结果将通过未来的实验作证。
Recently, several hints of lepton non-universality have been observed in the semileptonic B meson decays in terms of both in the neutral current ($b\to s l \bar{l}$) and charged current ($b\to c l \bar{ν_{l}}$) transitions. Motivated by these inspiring results, we perform the analysis of the baryon decays ${Σ_b}\to Σ_c l \bar{ν_{l}}$ and $Ω_b\to Ω_c l \bar{ν_{l}} (l=e,μ,τ)$ which are mediated by $ b \to c l \bar{ν_{l}}$ transitions at the quark level, to scrutinize the nature of new physics (NP) in the model independent method. We first use the experimental measurements of $\mathcal{B}( B\to D^{(*)} l\bar{ν_{l}})$, ${\rm R}_{D^{(*)}}$ and ${\rm R}_{J/ψ}$ to constrain the NP coupling parameters in a variety of scenarios. Using the constrained NP coupling parameters, we report numerical results on various observables related to the processes ${Σ_b}\to Σ_c l \bar{ν_{l}}$ and $Ω_b\to Ω_c l \bar{ν_{l}}$, such as the branching ratios, the ratio of branching fractions, the lepton side forward-backward asymmetries, the hadron and lepton longitudinal polarization asymmetries and the convexity parameter. We also provide the $q^2$ dependency of these observables and we hope that the corresponding numerical results in this work will be testified by future experiments.
