Time-reversal odd fragmentation and distribution functions in pp and ep single spin asymmetries

Abstract

We present some estimates of T-odd fragmentation and distribution functions, $H_1^{\perp }$ and $f_{1T}^{\perp }$, evaluated on the basis of a fit on experimental data in p${}^{\uparrow }$p. Assuming the T-odd fragmentation function to be responsible for the single spin asymmetry in pion production in p${}^{\uparrow }$p, we find the ratio $H_1^{\perp }/D_1$ to be in good agreement with the experimental results from DELPHI data on Z -> 2$-jetdecay.Weuseourestimatestomakepredictionsforep$^\uparrow$.

15 pages, Latex, 7 Postscript figures

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