An automated tool to facilitate consistent test-driven development of trigger selections for LHCb's Run 3
An automated tool to facilitate consistent test-driven development of trigger selections for LHCb's Run 3
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一种自动化工具，可促进 LHCb Run 3 触发器选择的一致测试驱动开发
DOI：
10.1051/epjconf/202125104024
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发表时间：
2021
影响因子：
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通讯作者：
Hunter R
中科院分区：
文献类型：
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作者：
Hunter R
2022 年重新启动后，LHCb 实验将以更高的瞬时光度运行，并利用前所未有的全软件触发器，有望实现更大的物理范围和效率。另一方面，遵守离线数据存储限制变得更具挑战性。这两个考虑因素都需要一组高度优化的触发选择。因此，我们推出了 HltEfficiencyChecker：LHCb 触发器应用程序的自动扩展，在由触发率和效率驱动的数据采集之前促进触发器开发。由于 2022 年的默认设置是仅将事件的候选信号保留到磁盘，而丢弃事件的其余部分，因此我们还计算由真实 MC 信号引起的决策的效率，通过将其与触发候选逐个匹配来进行评估。我们在此验证的匹配过程表明，“触发”和“信号触发”之间的区别对于表征触发选择的性能至关重要。
Upon its restart in 2022, the LHCb experiment at the LHC will run at higher instantaneous luminosity and utilize an unprecedented full-software trigger, promising greater physics reach and efficiency. On the flip side, conforming to offline data storage constraints becomes far more challenging. Both of these considerations necessitate a set of highly optimised trigger selections. We therefore present HltEfficiencyChecker: an automated extension to the LHCb trigger application, facilitating trigger development before data-taking driven by trigger rates and efficiencies. Since the default in 2022 will be to persist only the event’s signal candidate to disk, discarding the rest of the event, we also compute efficiencies where the decision was due to the true MC signal, evaluated by matching it to the trigger candidate hit-by-hit. This matching procedure – which we validate here – demonstrates that the distinction between a “trigger” and a “trigger-on-signal” is crucial in characterising the performance of a trigger selection.