A Novel Model-Independent Approach to Explore New Physics in Five-body Semileptonic Decays

• DOI: 10.48550/arxiv.2404.06523
• Publication Date: 2024-04-08
• Authors: Yao Yu; Han Zhang; B. C. Ke
• Keywords: Pseudovector; Matrix element; Semileptonic decay; Cabibbo–Kobayashi–Maskawa matrix; Matrix (chemical analysis)

We derive three parameters associated with the angular distribution of semileptonic five-body decays $D_{(s)}/B_{(s)}\to V\ell^+\nu_{\ell}\,(\ell=e,\mu,\tau)$ $V\to PPP$, where $V$ and $P$ denote vector pseudo-scalar particles. These parameters, expected to be unity in Standard Model, may deviate if new physics is involved. Our model-independent approach involves deriving specific form under most general decay matrix element V$. The outcomes have potential applications precisely testing Model exploring physics. Relevant measurements can carried out using data obtained from BESIII, Belle~II, LHCb.