Speakers
Description
Building upon the most recent CT18 global fit, we present a new set of parton distribution functions including the photon content of the proton based on an application of the LUX formalism. In this work, we explore two principal variations of the LUX ansatz. In one approach, which we designate "CT18lux," the photon PDF is calculated directly using the LUX formula for all scales, $\mu$. In an alternative realization, "CT18qed," we instead initialize the photon PDF in terms of the LUX formulation at a lower scale, $\mu\sim\mu_0$ , and evolve to higher scales with a combined QED+QCD kernel at $O(\alpha)$, $O(\alpha\alpha_s)$, $O(\alpha^2)$. While we find these two approaches generally agree, especially at intermediate $x$ $(10^{-3}
| Submitted on behalf of a Collaboration? | Yes |
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