First evidence for B_s^0 to phi eta-prime decay with relative branching ratio (3.56 ± 0.79 ± 0.18 ± 0.06) x 10^{-2} and absolute branching fraction (0.66 ± 0.15 ± 0.03 ± 0.02) x 10^{-6}.
Aaijet al.,Search for the decay B0 →ϕϕ , JHEP12(2025) 26
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A momentum sum-and-difference analysis separates detector bias sources in two-body decays, enabling a projected Lambda mass measurement at LHCb with 0.7 keV/c² tracking systematics and 2.2 keV/c² total uncertainty.
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Evidence for the decay $B^0_s\to\phi\eta'$
First evidence for B_s^0 to phi eta-prime decay with relative branching ratio (3.56 ± 0.79 ± 0.18 ± 0.06) x 10^{-2} and absolute branching fraction (0.66 ± 0.15 ± 0.03 ± 0.02) x 10^{-6}.
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Improving systematic uncertainties on precision two-body mass measurements
A momentum sum-and-difference analysis separates detector bias sources in two-body decays, enabling a projected Lambda mass measurement at LHCb with 0.7 keV/c² tracking systematics and 2.2 keV/c² total uncertainty.