Top-quark polarization and asymmetries at the LHC in the effective description of squark interactions A. Abrahantes, E. Arganda and S. Peñaranda Eur. Phys. J. C, 75 1 (2015) 37 Published online: 29 January 2015 DOI: 10.1140/epjc/s10052-015-3266-3