Efficiency Study of τ+jets Selection in TTbar Production by William Edson and Anirvan Sircar
This study investigates the selection efficiency of tau leptons in the TTbar decay channel leading to τ+jets final states. We define and analyze both signal and background selection efficiencies using efficiency equations. The results showcase how matched and unmatched taus contribute to total efficiency, focusing on cases that pass selection criteria. Key findings include the performance of various event categories (J0-J5), identifying failures in event selection criteria, and outlining methodology for tau matching. The study aims to optimize tau selection in particle physics experiments.
Efficiency Study of τ+jets Selection in TTbar Production by William Edson and Anirvan Sircar
E N D
Presentation Transcript
TTbarτ + jets:Tau Selection Efficiency Study William Edson SUNY at Albany AnirvanSircar
Efficiency Equation Definitions • Selection Signal Efficiency: εsig = 100 * Σ matched τ’s passing selection / Σ total matched τ’s • Selection Background Efficiency: εback = 100 * Σ unmatched τ’s passing selection / Σ total matched τ’s • ID Signal Efficiency εsig = 100 * Σ matched τ’s passing selection / Σ total matched τ’s prior to ID • ID Background Efficiency εsig = 100 * Σunmatched τ’s passing selection / Σ total matched τ’s prior to ID • When denominator = 0, set it to 1 • Tau matching via getTruthMatch function in TNtupleAnalyzer code • total matched determined during Object Selection • matched/unmatched during tau cut (C7)
Efficiency Study Results J0 – J3 • J0, J1 and J3 events all failed the cutflow prior to cut 7 and exhibited no matched taus during object selection
