Recent progress with the top to bottom approach to vectorization in GeantV Guilherme Amadio, Ananya, John Apostolakis, Marilena Bandieramonte, Shiba Behera, Abhijit Bhattacharyya, René Brun, Philippe Canal, Federico Carminati, Gabriele Cosmo et al. (30 more) EPJ Web Conf., 214 (2019) 02007 Published online: 17 September 2019 DOI: 10.1051/epjconf/201921402007