Study of CKM angle $γ$ sensitivity using flavor untagged $B^0_s\rightarrow \tilde{D}^{(*)0}φ$ decays

3 Aug 2020  ·  D. Ao, D. Decamp, W. B. Qian, S. Ricciardi, H. Sazak, S. T'Jampens, V. Tisserand, Z. R. Wang, Z. W. Yang, S. N. Zhang, X. K. Zhou ·

A sensitivity study for the measurement of the CKM angle $\gamma$ from $B^0_s\rightarrow \tilde{D}^{(*)0}\phi$ decays is performed using $D$ meson reconstructed in the quasi flavour-specific modes $K\pi$, $K3\pi$, $K\pi\pi^0$, and \CP-eigenstate modes $KK$ and $\pi\pi$, where the notation $\tilde{D}^0$ corresponds to a $D^0$ or a ${\tilde{D}^0}$ meson. The LHCb experiment is taken as a use case... A statistical uncertainty of about $8-19^{\circ}$ can be achieved with the $pp$ collision data collected by the LHCb experiment from year 2011 to 2018. The sensitivity to $\gamma$ should be of the order $3-8^{\circ}$ after accumulating 23\invfb of $pp$ collision data by 2025, while it is expected to further improve with 300~fb$^{-1}$ by the second half of the 2030 decade. The accuracy depends on the strong parameters $r^{(*)}_{B}$ and ${\delta^{(*)}_{B}}$, describing, together with $\gamma$, the interference between the leading amplitudes of the $B^0_s\rightarrow \tilde{D}^{(*)0}\phi$ decays. read more

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High Energy Physics - Experiment