Lepton polarization and sensitivity to the form factors in $Λ\to p\,\ell^-\barν_\ell$ with lattice QCD

We investigate the polarization of the charged lepton in the semileptonic hyperon decay $Λ\to p\,\ell^-\barν_\ell$ ($\ell=e,μ$) within the Standard Model, using the form factors obtained from lattice QCD. We compute the longitudinal, transverse and normal polarization of the lepton, the forward-back