Form-factor-independent test of lepton universality in semileptonic heavy meson and baryon decays

Stefan Groote, Mikhail A. Ivanov, Jürgen G. Körner +3

In the semileptonic decays of heavy mesons and baryons the lepton-mass dependence factors out in the quadratic ${\cos }^2\theta$ coefficient of the differential $\cos \theta$ distribution. We ca…