Forward neutral-pion transverse single-spin asymmetries in p + p collisions at sqrt[s] = 200 GeV. - Abelev BI; Aggarwal MM; Ahammed Z; Anderson BD; Arkhipkin D; Averichev GS; Bai Y; Balewski J; Barannikova O; Barnby LS; Baudot J; Baumgart S; et al. (Physical review letters, 2008)