Deep inelastic scattering from polarized spin-$1/2$ hadrons at low $x$ from string theory

Understand

We study polarized deep inelastic scattering of charged leptons from spin-$1/2$ hadrons at low values of the Bjorken parameter and large 't Hooft coupling in terms of the gauge/string theory duality.

• We calculate the structure functions from type IIB superstring theory scattering amplitudes.
• We discuss the role of the non-Abelian Chern-Simons term and the Pauli term from the five-dimensional $SU(4)$ gauged supergravity.
• Furthermore, the exponentially small-$x$ regime where Regge physics becomes important is analyzed in detail for the antisymmetric structure functions.