Double-lepton polarization asymmetries in Λb→Λℓ+ℓ- decay in universal extra dimension model T.M. Aliev, M. Savcı and B.B. Şirvanlı Eur. Phys. J. C, 52 2 (2007) 375-382 Published online: 10 August 2007 DOI: 10.1140/epjc/s10052-007-0356-x