Observation of Transverse Polarization Asymmetries of Charged Pion Pairs in e(+)e(-) Annihilation near root s=10.58 GeV

Abstract

The interference fragmentation function translates the fragmentation of a quark with a transverse projection of the spin into an azimuthal asymmetry of two final-state hadrons. In eeannihilation the product of two interference fragmentation functions is measured.We report nonzero asymmetries for pairs of charge-ordered þ pairs, which indicate a significant interference fragmentation function in this channel.