Test of the Universality of Naive-time-reversal-odd Fragmentation Functions

Abstract

We investigate the ''spontaneous'' hyperon transverse polarization in $e^{+}{e}^{-}$ annihilation and semi-inclusive deep inelastic scattering processes as a test of the universality of the naive-time-reversal-odd transverse momentum dependent fragmentation functions. We find that universality implies definite sign relations among various observables. This provides a unique opportunity to study initial/final state interaction effects in the fragmentation process and test the associated factorization.

Comments: 4 pages, 3 figures