Exclusive c u γ transitions of Bc meson
Abstract
We study the rare decays of the Bc meson induced by the flavour changing neutral current c u γ transition. In the Standard Model they are strongly suppressed by the Glashow-Iliopoulos-Maiani mechanism, therefore they are sensitive to new physics. The difficulty is to get rid of long-distance contributions. We study such effects in radiative Bc transitions both to B* and to the axial-vector B1 meson.
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