High-Precision Prediction for a DIS Event Shape

In this talk, we present high-precision predictions for a DIS 1-jettiness event shape using the framework of Soft Collinear Effective Theory (SCET). This allows us to achieve next-to-next-to-next-to-leading-logarithmic (N3LL) resummation accuracy, matched to two-loop fixed-order QCD results obtained through the NLOJet++ Monte Carlo generator. We rigorously account for nonperturbative power corrections, including universal hadronization effects and a systematic treatment of the renormalon ambiguities. SCET enables a seamless transition between the resummation, fixed-order, and nonperturbative regions, while providing robust uncertainty estimates across a broad range of kinematics (x, Q), relevant to both HERA data and future measurements at the Electron-Ion Collider (EIC). These results are critical for precise determinations of the strong coupling constant and the universal nonperturbative parameter, positioning them as an important benchmark for future EIC studies.