<img width="439" alt="image" src="https://github.com/user-attachments/assets/569bcbc7-a9a7-4b21-87b5-8cfa52b6455c"> Would be easy to code - internal note [link](https://twiki.cern.ch/twiki/pub/LHCbPhysics/Xib2DLPi/LHCb-ANA-2022-049-v3.7.pdf) Eq. 30
Would be easy to code