Affiliation:
1. University of Turin
2. Indian Institute of Technology Bombay
Abstract
A new method is suggested for the extraction of
uu-quark
and dd-quark
transversity distributions, using single spin asymmetry (SSA) data in
semi-inclusive deep inelastic scattering (SIDIS) processes, where they
couple to the Collins or the di-hadron fragmentation functions. We
discuss a recent suggestion to extract the transversity distribution
using the concept of difference asymmetries and their ratios, which
avoids the requirement of Collins function. We suggest new measurements,
involving ratios of polarized cross-sections, that would directly probe
the ratio h_1^{d_v}/h_1^{u_v}h1dv/h1uv.
We also show some numerical estimates.