4 papers · 1 filter
Improved positivity bound for Deep Inelastic Scattering on transversely polarized nucleon
J. Soffer, O. V. Teryaev
The positivity bound for the transverse asymmetry may be improved by making use of the fact, that the state of a photon and a nucleon with total spin 3/2, does not participat…
Sum Rules and Positivity Constraints on Nucleon Spin Structure
O. Teryaev, B. Pire, J. Soffer
The spin structure of nucleon at twist 2 and 3 levels is analyzed. The contribution of quark and gluon spins to nucleon spin are Lorentz invariant, while it is not sure for orbital…
Transverse spin effects and higher twist in the singlet channel
J. Soffer, O. V. Teryaev
The effects, originating from the longitudinal gluon polarization, are considered. We derive the analogue of the Wandzura-Wilczek relation for the light-cone distributions of polar…
Neutron spin-dependent structure function, Bjorken sum rule, and first evidence for singlet contribution at low x
J. Soffer, O. Teryaev
We perform the isospin decomposition of proton and neutron SLAC data in the region . The isovector part is well described by a power behaviour , where $α…