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We determine the nucleon electromagnetic form factors and their uncertainties from world electron scattering data. The analysis incorporates two-photon exchange corrections, constraints on the low-Q2 and high-Q2 behavior, and additional uncertainties to account for tensions between different data sets and uncertainties in radiative corrections.
In the wake of the recent measurements of the decays Bc→J/ψπ(K) and Bc→J/ψℓνℓ reported by the LHCb Collaboration we calculate the form factors for the Bc→J/ψ and Bc→ηc transitions in full kinematical region within covariant confined quark model. Then we use the calculated form factors to evaluate the partial decay widths of the above-mentioned semileptonic and nonleptonic decays of the Bc meson. We...
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