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

Understand

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.