Photon Reconstruction in the Belle II Calorimeter Using Graph Neural Networks

被引：1
|
作者：
Wemmer F.
Haide I.
Eppelt J.
Ferber T.
Beaubien A.
Branchini P.
Campajola M.
Cecchi C.
Cheema P.
De Nardo G.
Hearty C.
Kuzmin A.
Longo S.
Manoni E.
Meier F.
Merola M.
Miyabayashi K.
Moneta S.
Remnev M.
Roney J.M.
Shiu J.-G.
Shwartz B.
Unno Y.
van Tonder R.
Volpe R.
机构：
来源：
Computing and Software for Big Science | 2023年 / 7卷 / 1期
关键词：
Calorimeter; Deep learning; End-to-end representation spaces; Fuzzy clustering; Graph neural networks; High background; Machine learning; Overlapping clusters; Photon reconstruction;
D O I：
10.1007/s41781-023-00105-w
中图分类号：
学科分类号：
摘要：
We present the study of a fuzzy clustering algorithm for the Belle II electromagnetic calorimeter using Graph Neural Networks. We use a realistic detector simulation including simulated beam backgrounds and focus on the reconstruction of both isolated and overlapping photons. We find significant improvements of the energy resolution compared to the currently used reconstruction algorithm for both isolated and overlapping photons of more than 30% for photons with energies Eγ<0.5GeV and high levels of beam backgrounds. Overall, the GNN reconstruction improves the resolution and reduces the tails of the reconstructed energy distribution and therefore is a promising option for the upcoming high luminosity running of Belle II. © 2023, The Author(s).
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