Abstract
We calculate the asymmetry in production in electron-proton collision for the kinematics of the planned electron-ion collider (EIC). This directly probes the Weiszäcker-Williams type linearly polarized gluon distribution. Assuming generalized factorization, we calculate the asymmetry at next-to-leading-order when the energy fraction of the satisfies and the dominating subprocess is . We use the nonrelativistic QCD based color singlet model for production. We investigate the small region which will be accessible at the EIC. We present the upper bound of the asymmetry, as well as estimate it using a (i) Gaussian-type parametrization for the transverse momentum dependent parton distributions and (ii) McLerran-Venugopalan model at small . We find small but sizable asymmetry in all three cases.
- Received 27 November 2018
DOI:https://doi.org/10.1103/PhysRevD.99.054012
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society