BDT-Based Single Tau Selection Algorithm for the Level-2 ATLAS Hadronic Tau Trigger

• Author / Creator

  Karamaoun, Andrew

• We present a Boosted Decision Tree (BDT) based algorithm, with promising potential, that can be used at the level-2 stage of the ATLAS Hadronic Tau Trigger for the selection of a single hadronically decaying tau lepton. The results indicate that our algorithm outperforms the current algorithm on a wide variety of measures. The BDT trigger adds (8.242±0.068±0.321)% to the Z → τ τ signal RoI-wise acceptance rate of the reference trigger and adds (10.628 ± 0.069 ± 0.276)% to the Z → τ τ signal event-wise acceptance rate of the reference trigger. Not only does the BDT trigger outperform the current trigger for Standard Model signal channels, but it also dominates the current trigger for yet undiscovered high mass
  resonances that will be more accessible in the upcoming (higher energy) running period.

• Subjects / Keywords

  • BDT
  • Trigger
  • Particle physics

• Graduation date

  Fall 2013

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R30399

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.