Dihadron beam spin asymmetries provide a wide range of insights into nucleon structure and hadronization. Recent measurements at CLAS12 provide the first empirical evidence of nonzero $G_1^\perp$, the parton helicity-dependent dihadron fragmentation function (DiFF) encoding spin-momentum correlations in hadronization. These measurements also allow for a point-by-point extraction of the subleading-twist PDF $e(x)$ in a collinear framework. We observe different behavior of the asymmetries in different invariant mass regions, motivating a fully multidimensional study. The DiFFs also expand in terms of partial waves, each corresponding to the interference of dihadrons of particular polarizations. Altogether a fully multidimensional partial wave analysis is needed, and this presentation will summarize the efforts and results obtained thus far.
Cited by 1
Arrington et al., The solenoidal large intensity device (SoLID) for JLab 12 GeV
J. Phys. G: Nucl. Part. Phys. 50, 110501 (2023) [Crossref]
Author / Affiliation: mappings to Contributors and OrganizationsSee all Organizations.
- Centre National de la Recherche Scientifique / French National Centre for Scientific Research [CNRS]
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (through Organization: Commissariat à l'énergie Atomique et aux énergies Alternatives / Atomic Energy and Alternative Energies Commission [CEA])
- Instituto Nazionale di Fisica Nucleare (INFN) (through Organization: Istituto Nazionale di Fisica Nucleare / National Institute for Nuclear Physics [INFN])
- Ministry of Education and Science of the Russian Federation (through Organization: Министерство образования и науки Российской Федерации / The Ministry of Education and Science of the Russian Federation)
- National Research Foundation of Korea [NRF]
- National Science Foundation [NSF]
- Science and Technology Facilities Council [STFC]
- United States Department of Energy [DOE]