Speaker
Description
In [1] it was shown that gT(x) can contribute to a Single Spin Asymmetry in SIDIS. This contribution
arises through certain two-loop diagrams which provide the necessary imaginary phase for the asymmetry. In this
talk, I discuss our work in [2] where we presented numerical estimates of the above asymmetry at the planned Electron-Ion
Collider. Therein we also included an analogous gluon-initiated contribution arising from the G3T(x) distribution.
In our framework, both gT(x) and G3T(x) were considered in the Wilczek-Wandzura (WW) approximation, i.e., as integrals
of the quark and gluon helicity distributions respectively. Hence these contributions to the asymmetry can be
evaluated unambiguously without inputs from unknown parameters such as genuine twist-3 distributions. We find that
the asymmetry associated with the sin(phi_h - phi_S), sin(phi_S) and sin(2phi_h-phi_S) harmonics can reach up to 1-2%
at the Electron-Ion Collider.
[1] S. Benić, Y. Hatta, H-n. Li, D.-J. Yang, Phys. Rev. D 100 (2019) 9, 094027
[2] S. Benić, Y. Hatta, A. K, H-n. Li, Phys. Rev. D 104 (2021), 094027
| Submitted on behalf of a Collaboration? | No |
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