Title: Novel Model-Independent Approach to Explore New Physics in Five-body Semileptonic Decays Show Chinese title

Title: 五体半轻子衰变中探索新物理的新型模型无关方法

Abstract: Substantial contribution of the tensor current in semileptonic decays is regarded as a clear signal for new physics. In this work, we propose a model-independent approach to unambiguously test contribution of the tensor current in semileptonic five-body decays $\bar{D}_{(s)}/\bar{B}_{(s)}\to V\ell\bar{\nu}_{\ell}\,(\ell=e,\mu,\tau)$ with $V\to \pi^0\pi^+\pi^-$, where $V$ denotes vector particles. We derive three parameters associated with the angular asymmetry, which are always equal to one in the Standard Model regardless the data of form factor but will deviate if contribution of the tensor current doesn't vanish. The outcomes have potential applications in precisely testing the Standard Model and searching for new physics. Relevant measurements can be performed using data collected by BESIII, Belle~II, and LHCb. Show Chinese abstract

Abstract: 张量电流在半轻子衰变中的显著贡献被视为新物理的明确信号。 在本工作中，我们提出一种模型无关的方法，以无歧义地测试半轻子五体衰变$\bar{D}_{(s)}/\bar{B}_{(s)}\to V\ell\bar{\nu}_{\ell}\,(\ell=e,\mu,\tau)$中张量电流的贡献，其中$V\to \pi^0\pi^+\pi^-$， $V$表示矢量粒子。 我们推导出与角不对称性相关的三个参数，这些参数在标准模型中无论形式因子的数据如何始终等于一，但如果张量电流的贡献不消失，则会偏离。 这些结果在精确检验标准模型和寻找新物理方面具有潜在应用。 相关测量可以使用BESIII、Belle~II和LHCb收集的数据进行。