Study of the CKM angle γ sensitivity using flavor untagged decays Supported by National Natural Science Foundation of China (NSFC) (11925504, 11975015); the 65th batch of China Postdoctoral Fund; the Fundamental Research Funds for the Central Universities, CNRS/IN2P3 (France), and STFC (United Kingdom) national agencies. Part of this work was supported through exchanges between Annecy, Beijing, and Clermont-Ferrand, by the France China Particle Physics Laboratory (i.e. FCPPL),Chinese Physics C

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Study of the CKM angle γ sensitivity using flavor untagged decays Supported by National Natural Science Foundation of China (NSFC) (11925504, 11975015); the 65th batch of China Postdoctoral Fund; the Fundamental Research Funds for the Central Universities, CNRS/IN2P3 (France), and STFC (United Kingdom) national agencies. Part of this work was supported through exchanges between Annecy, Beijing, and Clermont-Ferrand, by the France China Particle Physics Laboratory (i.e. FCPPL)
Chinese Physics C ( IF 3.6 ) Pub Date : 2021-02-03 , DOI: 10.1088/1674-1137/abd16d
D. Ao ₁ , D. Decamp ₂ , W. B. Qian ₁ , S. Ricciardi ₃ , H. Sazak ₄ , S. T’Jampens ₂ , V. Tisserand ₄ , Z. R. Wang ₅ , Z. W. Yang ₅ , S. N. Zhang ₆ , X. K. Zhou ₁

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A sensitivity study on the measurement of the CKM angle $\gamma$ from ${{B^0_s}}\rightarrow \tilde{D}^{(*)0}\phi$ 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 $\tilde{D}^0$ corresponds to a ${{D^0}}$ or ${{{\kern 0.2em\overline{\kern -0.2em D}{}}{}^0}}$ meson. The LHCb experiment is presented as a use case. A statistical uncertainty of approximately $8^{\circ}-19^{\circ}$ 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 $3^{\circ}-8^{\circ}$ 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 ${{B^0_s}}\rightarrow \tilde{D}^{(*)0}\phi$ decays.

更新日期：2021-02-03

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