We present a systematic study of twist-3 light-cone distribution amplitudes of K and φ mesons in QCD. The structure of SU(3)-breaking corrections is studied in detail. Nonperturbative input parameters are estimated from QCD sum rules. As a by-product, we update the parameters describing the twist-3 distribution amplitudes of the ρ meson. We also review and update predictions for the twist-2 dis...

We report the value of electric quadrupole moment $^{209}$Bi extracted from atomic data. For this, we performed electronic structure calculations for ground $^4S^o_{3/2}$ and excited $^2P^o_{3/2}$ states Bi using Dirac-Coulomb-Breit Hamiltonian Fock space coupled cluster method with single, double, full triple amplitudes three-particle sector. The $^{209}$Bi, $Q(^{209}$Bi$)=-418(6)$~mb, derived...