Superstrings and the proton structure

MARTIN SCHVELLINGER

Bariloche

Seminario; Seminario del grupo de Física Teórica del Instituto Balseiro; 2024

Grupo de Física Teórica del Instituto Balseiro

We present a detailed analysis of the polarized and the unpolarized deep inelastic scattering structure functions of the proton, g_1^p and F_2^p respectively, in the context of a holographic dual description based on type IIB superstring theory. We compare this description with experimental data and Quantum Chromodynamics estimates computed at leading, next-to-leading and next-to-next-to-leading order in perturbation. We confront the predictions of a holographic dual model and those of perturbative QCD for g_1^p at the kinematics that will be probed by the forthcoming Electron-Ion Collider. We find that the extrapolation of g_1^p to very small values the Bjorken variable computed with a Holographic Pomeron model based on actual data at higher momentum fractions is always positive and differs significantly with standard projections based on perturbative QCD. Based on e-Prints: 2308.01975 [hep-ph] & 2207.02984 [hep-ph].