Main Image
Volume 316 - XXVI International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2018) - WG2: Small-x and Diffraction
Progress in higher order computations of prompt photon production in e + A DIS at small x
R. Venugopalan,* K. Roy
*corresponding author
Full text: pdf
Pre-published on: 2018 September 20
Published on: 2018 November 23
We compute the differential cross-section for inclusive prompt photon production in deeply inelastic electron-nucleus scattering at small $x$ in the framework of the Color Glass Condensate (CGC) effective field theory (EFT). At leading order in $\alpha_s$, but all orders in $Q_s^2/Q^2$, where $Q_s$ is the saturation scale in the nucleus, our result is proportional to universal dipole and quadrupole Wilson line correlators in the nucleus. Leading twist $k_{\perp}$ and collinearly factorized results are recovered in appropriate limits. We outline recent progress in extending the LO results to NLO+NLL$x$ accuracy.
Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.