The LHCb trigger and its performance in 2011
Name
Williams_The lhcb trigger.pdf
Size
450.66 KB
Format
Adobe PDF
Checksum (MD5)
864d5af8d5a329e821ec8e8f9731d327
Author(s)
Williams, M.
Date Issued
April 2013
Journal
Journal of Instrumentation
Publisher
Institute of Physics Publishing for SISSA Medialab
Citation
Aaij, R, J Albrecht, F Alessio, S Amato, E Aslanides, I Belyaev, M van Beuzekom, et al. “The LHCb Trigger and Its Performance in 2011.” Journal of Instrumentation 8, no. 04 (April 1, 2013): P04022–P04022.
Version
Final published version
Abstract
This paper presents the design of the LHCb trigger and its performance on data taken at the LHC in 2011. A principal goal of LHCb is to perform flavour physics measurements, and the trigger is designed to distinguish charm and beauty decays from the light quark background. Using a combination of lepton identification and measurements of the particles' transverse momenta the trigger selects particles originating from charm and beauty hadrons, which typically fly a finite distance before decaying. The trigger reduces the roughly 11 MHz of bunch-bunch crossings that contain at least one inelastic pp interaction to 3 kHz. This reduction takes place in two stages; the first stage is implemented in hardware and the second stage is a software application that runs on a large computer farm. A data-driven method is used to evaluate the performance of the trigger on several charm and beauty decay modes.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution- NonCommercial-Share Alike 3.0 Unported licence.
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DOI of Published Version
https://doi.org/10.1088/1748-0221/8/04/P04022
