Abstract
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. In this case the holographic dual picture of the Pomeron exchange is realized by a Reggeized gauge field. We compare our results with experimental data of the proton antisymmetric structure function g1, obtaining a very good level of agreement.
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Kovensky, N., Michalski, G. & Schvellinger, M. Deep inelastic scattering from polarized spin-1/2 hadrons at low x from string theory. J. High Energ. Phys. 2018, 84 (2018). https://doi.org/10.1007/JHEP10(2018)084
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DOI: https://doi.org/10.1007/JHEP10(2018)084