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  • Arratia, Miguel; Ryan, Milton; Paul, Sebouh J; Barak Schmookler; Zhang, Weibin

    arXiv (Cornell University), 07/2023
    Paper, Journal Article

    Measuring the region \(0.1 < Q^{2} < 1.0\) GeV\(^{2}\) is essential to support searches for gluon saturation at the future Electron-Ion Collider. Recent studies have revealed that covering this region at the highest beam energies is not feasible with current detector designs, resulting in the so-called \(Q^{2}\) gap. In this work, we present a design for the Few-Degree Calorimeter (FDC), which addresses this issue. The FDC uses SiPM-on-tile technology with tungsten absorber and covers the range of \(-4.6 < \eta < -3.6\). It offers fine transverse and longitudinal granularity, along with excellent time resolution, enabling standalone electron tagging. Our design represents the first concrete solution to bridge the \(Q^{2}\) gap at the EIC.