Study of the CKM angle γ sensitivity using flavor untagged Bs0 → (D)over-tilde(*)0φ decays

A sensitivity study on the measurement of the CKM angle gamma from B-s(0) -> (D) over tilde (()*()0)phi decays is conducted using the D-meson reconstructed in the quasi flavour-specific modes K pi, K3 pi, and K pi pi(0), as well as CP-eigenstate modes KK and pi pi, where the notation (D) over tilde (0) corresponds to a D-0 or (D) over bar (0) meson. The LHCb experiment is presented as a use case. A statistical uncertainty of approximately 8 degrees - 19 degrees can be achieved with the pp collision data collected in the LHCb experiment from 2011 to 2018. The sensitivity to gamma should be of the order 3 degrees - 8 degrees after accumulating 23 fb(-1) of pp collision data by 2025, whereas it is expected to improve further by 300 fb(-1) by the second half of the 2030 decade. The accuracy is dependent on the strong parameters r(B)(()*()) and delta(()(B)*()), which together with gamma describe the interference between the leading amplitudes of the B-s(0) -> (D) over tilde (()*()0)phi decays.