Abstract
The measurement of transverse single-spin asymmetries for baryon production in the target fragmentation region of semi-inclusive deep-inelastic scattering (SIDIS), can produce important insight into those nonperturbative aspects of QCD directly associated with confinement and with the dynamical breaking of chiral symmetry. We discuss here, interns of spin-directed momentum transfers, the powerful quantum field-theoretical constraints on the spin-orbit dynamics underlying these transverse spin observables. The spin-directed momentum shifts, originating either in the target nucleon or in the QCD jets produced in the deep inelastic scattering process, represent significant quantum entanglement effects connecting information from current fragmentation with observables in target fragmentation.
Highlights
Ατ -odd spin-directed momentum shifts, originating either in the target nucleon (δ kTN ) or in the QCD jets (δ pTN ) produced in the deep inelastic scattering process, represent significant quantum entanglement effects connecting information from current fragmentation with observables in target fragmentation
The systematic, organized program of such measurements should be done at the Jefferson Lab CEBAF 12 GeV machine [3] due to the importance of single-spin observables in understanding spin-orbit dynamics in a full range of kinematics
[4] The four fractured functions presented here describe the spin-dependent differences of the conjoint probabilities for detecting a quark jet with kinematics defined by x = xbj = Q2 / 2 p.q and transverse momentum kT and a final-state baryon with kinematics defined by the Feynman variable z = zB = p ⋅ pB / p ⋅ q and transverse momentum pT in the same deep-inelastic scattering event
Summary
Ατ -odd spin-directed momentum shifts, originating either in the target nucleon (δ kTN ) or in the QCD jets (δ pTN ) produced in the deep inelastic scattering process, represent significant quantum entanglement effects connecting information from current fragmentation with observables in target fragmentation. For the final-state polarization observables we can define the Polarizing Fractured Functions (PFF)
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