Abstract
We argue that the B c exclusive nonleptonic decays are perturbatively calculable. Working in a perturbative QCD model of Brodsky et al., we pay attention to the estimate of the partial widths of the modes B c → J Ψπ + , J Ψϱ + , etc., which serve to identify B c mesons and determine the B c mass and life time. Our estimations are found to be lower than the other predictions. We note that the spectator ansatz might be misleading in dealing with B c weak decays. So the results will be potentially important at LHC to measure the B c meson and to test various models of weak decays of heavy mesons.
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