Final-state polarization in B s 0 decays Alakabha Datta, David London, Joaquim Matias, Makiko Nagashima and Alejandro Szynkman Eur. Phys. J. C, 60 2 (2009) 279-284 Published online: 12 February 2009 DOI: 10.1140/epjc/s10052-009-0883-8