RELATIVISTIC AND BINDING-ENERGY CORRECTIONS TO HEAVY-QUARK FRAGMENTATION TO POLARIZED QUARKONIUM

We calculate the fragmentation function for a charm quark to decay inc lusively into transversely and longitudinally polarised J/psi, includi ng relativistic and binding energy corrections in powers of the quark relative velocity upsilon. We use these fragmentation functions to cal culate the asymmetry in the angular distribution of leptons produced i n the subsequent decay of J/psi. We point out that the inclusion of th e said corrections reduces this asymmetry from 5% to about 2%. (C) 199 8 Published by Elsevier Science B.V.