The LHCb Turbo stream
| Autor: | Puig A, LHCb trigger group |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Nuclear and High Energy Physics Data processing Large Hadron Collider biology 010308 nuclear & particles physics Turbo Hadron Real-time computing Detector Process (computing) biology.organism_classification 01 natural sciences LHCb Trigger 0103 physical sciences LHC Run II Charm (quantum number) 010306 general physics Instrumentation Particle Physics - Experiment Event reconstruction |
| DOI: | 10.1016/j.nima.2015.11.081 |
| Popis: | The LHCb experiment will record an unprecedented dataset of beauty and charm hadron decays during Run II of the LHC, set to take place between 2015 and 2018. A key computing challenge is to store and process this data, which limits the maximum output rate of the LHCb trigger. So far, LHCb has written out a few kHz of events containing the full raw sub-detector data, which are passed through a full offline event reconstruction before being considered for physics analysis. Charm physics in particular is limited by trigger output rate constraints. A new streaming strategy includes the possibility to perform the physics analysis with candidates reconstructed in the trigger, thus bypassing the offline reconstruction. In the Turbo stream the trigger will write out a compact summary of physics objects containing all information necessary for analyses. This will allow an increased output rate and thus higher average efficiencies and smaller selection biases. This idea will be commissioned and developed during 2015 with a selection of physics analyses. It is anticipated that the turbo stream will be adopted by an increasing number of analyses during the remainder of LHC Run II (2015-2018) and ultimately in Run III (starting in 2020) with the upgraded LHCb detector. (C) 2016 CERN. Published by Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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