The transverse-spin asymmetry AsinϕSΛUUT in Λ production in SIDIS within the collinear framework

@misc{yang2026transversespin,
  title = {{The transverse-spin asymmetry $A^\sinϕ_S_Λ_UUT$ in $Λ$ production in SIDIS within the collinear framework}},
  author = {Yongliang Yang and Zhun Lu},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.08644},
  eprint = {2609.08644},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.08644},
}

TY  - UNPB
TI  - The transverse-spin asymmetry A^sinϕ_S_Λ_UUT in Λ production in SIDIS within the collinear framework
AU  - Yongliang Yang
AU  - Zhun Lu
PY  - 2026
DA  - 2026/09/08
PB  - arXiv
DO  - 10.48550/arxiv.2609.08644
UR  - https://arxiv.org/abs/2609.08644
AB  - We investigate the transverse-spin asymmetry A^sinϕ_S_Λ_UUT for transversely polarized Λ production in semi-inclusive deep inelastic scattering with an unpolarized electron beam and an unpolarized nucleon target. The spin-dependent asymmetry is sensitive to the twist-3 T-odd quark-gluon-quark fragmentation function D̃_T, which describes the correlation between an unpolarized fragmenting quark and the transverse polarization of the produced hadron. We calculate D̃_T of the Λ hyperon within a diquark model and investigate its contribution to the asymmetry. We determine the model parameters by fitting the fragmentation functions D_1 and G_1 to the DSV parametrization. Using the numerical results of the model and the available parametrization of the unpolarized parton distribution function f_1, we predict the asymmetry in the electroproduction of the Λ hyperon in the kinematic regions of the EIC and the EicC. We also examine the impact of including the strange-quark contribution on the transverse-spin asymmetry. In our phenomenological analysis, we include the QCD evolution of the parton distribution function f_1 and the fragmentation function D̃_T. The results show that the asymmetry is sizable and can be significantly modified by the strange-quark contribution.
ER  -