Orateur
Description
The transverse single spin asymmetries (TSSAs) in semi-inclusive deep inelastic scattering (SIDIS) have been intensively investigated over the last two decades. The TSSAs of $\rho^{0}$ are recently measured by COMPASS. Among these, the Sivers asymmetry can be expressed within the transverse momentum dependent (TMD) factorization framework, as the convolution of the Sivers function of the nucleon and the unpolarized fragmentation function of the final-state hadron. We perform a phenomenological study and find that the COMPASS data can be well described by the Sivers function extracted from SIDIS data with pion and kaon production. This finding serves as a test for the universality of the Sivers function within the current experimental precision. Based on these results, we predict the Sivers asymmetry of $\rho^{0}$ and $K^{*}$ in future facilities, such as electron-ion colliders and the Jefferson Lab 22 GeV (JLab22).
