<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math> -nucleus optical potentials from chiral effective field theory <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:math> interactions

We present a determination of optical potentials for $^4$He-target collisions using the double-folding method. use chiral effective field theory nucleon-nucleon interactions at next-to-next-to-leading order combined with state-of-the-art nucleonic densities. The imaginary part potential is obtained from real interaction either through proportionality constant or applying Kramers-Kronig dispersion relations. With these potentials, we compute elastic scattering $^4$He off various targets, to $^{120}$Sn. study sensitivity our predicted cross sections choice and nuclear Very good agreement existing elastic-scattering data energies between 100 400 MeV.