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arXiv · 2606.00362

Impact of Future Dihadron Production Measurements on the Transversity Distributions and Tensor Charges of the Nucleon

Yorgo Sawaya·Christina Cocuzza·Gregory Matousek·Matthew McEneaney·Andreas Metz·Daniel Pitonyak·Alexei Prokudin·Nobuo Sato·Anselm Vossen
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Abstract

We assess the impact of future measurements of dihadron production in semi-inclusive deep-inelastic scattering from the CLAS12 and proposed SoLID experiments at Jefferson Lab, as well as from the ePIC experiment at the future Electron-Ion Collider (EIC), on the transversity parton distribution functions (PDFs) and the corresponding tensor charges of the nucleon. To this end, we generate pseudo-data for these experiments for a proton target (CLAS12 and ePIC) and a $^3$He target (SoLID and ePIC), and we include these pseudo-data in the JAMDiFF global analysis of existing experimental dihadron data. We find that future data from Jefferson Lab will significantly reduce uncertainties in the transversity PDFs in the region of intermediate-to-large quark momentum fractions $x$, while the EIC will provide strong constraints across the entire range of $x$, allowing for the first experimental test of the predicted small-$x$ behavior of the transversity PDFs. In discussing the reduction of uncertainties in the tensor charges, we also compare the results from the data analyses with those from lattice QCD, highlighting scenarios in which compatibility or tension between the two would arise.

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Yorgo Sawaya, Christina Cocuzza, Gregory Matousek, Matthew McEneaney, Andreas Metz, Daniel Pitonyak, Alexei Prokudin, Nobuo Sato, Anselm Vossen. 2026-05-29. Impact of Future Dihadron Production Measurements on the Transversity Distributions and Tensor Charges of the Nucleon. https://arxiv.org/abs/2606.00362

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