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Computing and software for LHCb Upgrade II

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arxiv 2503.24106 v1 pith:5AKSUKHM submitted 2025-03-31 hep-ex physics.ins-det

classification hep-exphysics.ins-det
keywords experimentwillhighlhcbupgradechallengescomputingdata
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

A second major upgrade of the LHCb experiment is necessary to allow full exploitation of the High Luminosity LHC for flavour physics. The new experiment will operate in Run 5 of the LHC at a luminosity up to $1.5\times 10^{34}cm^{-2}s^{-1}$. The experiment will therefore experience extremely high particle fluences and data rates, posing a high challenge not only for the detector but also for the software and computing resources needed to readout, reconstruct, select and analyse the data. This document presents these challenges and the ongoing and future R&D programme necessary to address them. This programme will benefit not only the LHCb Upgrade II experiment, but the whole particle physics community as similar challenges will be faced by the next generation of experiments.

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