Evidence for a Transverse Single-Spin Asymmetry in Leptoproduction of pi+pi- Pairs

Abstract

A single-spin asymmetry was measured in the azimuthal distribution of pi+pi- pairs produced in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target. For the first time, evidence is found for a correlation between the transverse target polarization and the azimuthal orientation of the plane containing the two pions.The corresponding single-spin asymmetry is expected to be related to the product of the little-known quark transversity distribution function and an unknown naive-T-odd chiral-odd dihadron fragmentation function.

18 pages, 4 figures, 1 table; minor revisions to content for clarity

References in corpus (3)

• Modeling dihadron fragmentation functions
• Evolution equations for extended dihadron fragmentation functions
• Transversity from two pion interference fragmentation

Cited by in corpus (20)

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• Transversity distributions and tensor charges of the nucleon: extraction from dihadron production and their universal nature
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• Single-spin asymmetry in dihadron production in SIDIS off the longitudinally polarized nucleon target
• Realistic estimate of valence transversity distributions from inclusive dihadron production
• Transversity distributions from difference asymmetries in semi-inclusive DIS
• Unraveling sub-leading twist GTMDs of proton using LFQDM
• Sivers Effect in Dihadron Semi-Inclusive Deep Inelastic Scattering
• Analogies between hadron-in-jet and dihadron fragmentation
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