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arXiv · 2412.16123

Prospects for measurements of the longitudinal proton structure function $F_L$ at the Electron Ion Collider

Javier Jiménez-López·Paul R. Newman·Katarzyna Wichmann
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Abstract

We explore the potential for extracting the longitudinal proton structure function $F_{L}$ at the future Electron-Ion Collider (EIC) through a Rosenbluth separation method. The impacts of differing assumptions on sample sizes, systematic uncertainties and beam energy scenarios are investigated. With a sufficiently large number of centre of mass energy configurations and well-controlled systematics, the EIC will measure $F_{L}$ to an unprecedented precision, even with relatively modest luminosities. The accessible kinematic range complements both fixed target and HERA data. In the most optimistic scenarios, the EIC data will be a highly competitive direct probe of the proton gluon density.

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Javier Jiménez-López, Paul R. Newman, Katarzyna Wichmann. 2024-12-20. Prospects for measurements of the longitudinal proton structure function $F_L$ at the Electron Ion Collider. https://arxiv.org/abs/2412.16123

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