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arXiv · 2604.22332

Confronting Color Glass Condensate at next-to-leading order with HERA data

Carlisle Casuga·Heikki Mäntysaari
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Abstract

We perform a global analysis of HERA total inclusive cross section and charm quark production data to extract the non-perturbative initial condition for the next-to-leading order Balitsky-Kovchegov (BK) equation. We extend our previous analyses to full next-to-leading order + next-to-leading logarithm (NLO+NLL) accuracy by combining the NLO DIS impact factors with the NLO BK equation that includes the resummation of large double and single logarithms. The developed Bayesian setup extracts the posterior that describes the distribution of the parameters that best fit the data. The posterior distribution allows for estimates of the theoretical uncertainty of the dipole amplitude and, hence, offers a streamlined method for propagating uncertainties in the BK initial condition in NLO CGC calculations.

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Carlisle Casuga, Heikki Mäntysaari. 2026-04-24. Confronting Color Glass Condensate at next-to-leading order with HERA data. https://arxiv.org/abs/2604.22332

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