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Implementation and performance of a tau lepton selection within the ATLAS trigger system at the LHC (2006) |
- Casado, M P,
- Dos Anjos, A,
- Armstrong, S,
- Baines, J T M,
- Bee, C P,
- Biglietti, M,
- Bogarets, A,
- Bosman, M,
- Caron, B,
- Cataldi, G,
- Cavalli, D,
- Comune, G,
- Conde, P,
- Crone, G,
- Damazio, D,
- De Santo, A,
- Díaz-Gómez, M,
- Di Mattia, A,
- Ellis, Nick,
- Emeliyanov, D,
- Epp, B,
- Falciano, S,
- Garitaonandia, H,
- George, S,
- Ghete, V,
- Goncalo, R,
- Haller, J,
- Kabana, S,
- Khomich, A,
- Kilvington, G,
- Kirk, J,
- Konstantinidis, N P,
- Kootz, A,
- Lankford, A J,
- Lowe, A,
- Luminari, L,
- Maeno, T,
- Massik, J,
- Messen, C,
- Mello, A G,
- Moore, R,
- Morettini, P,
- Negri, A,
- Nikitin, N,
- Nisati, A,
- Osuna, C,
- Padilla, C,
- Panikashvilli, N,
- Parodi, F,
- Pasqualucci, E,
- Pérez-Réale, V,
- Pinfold, J L,
- Pinto, P,
- Qian, Z,
- Resconi, S,
- Rosati, S,
- Sánchez, C,
- Santamarina-Rios, C,
- Scannicchio, D A,
- Schiavi, C,
- Segura, E,
- De Seixas, J M,
- Sivoklokov, S Yu,
- Sobreira, A,
- Soluk, R A,
- Stefanidis, E,
- Sushkov, S,
- Sutton, M,
- Tapprogge, S,
- Tarem, S,
- Thomas, E,
- Touchard, F,
- Usai, G,
- Venda-Pinto, B,
- Ventura, A,
- Vercesi, V,
- Wengler, T,
- Werner, P,
- Wheeler, S J,
- Wickens, F J,
- Wiedenmann, M,
- Wielers, M,
- Zobernig, H
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Abstract |
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The ATLAS experiment at the Large Hadron Collider (LHC) has an interaction rate of up to $10^9$ Hz. The trigger must efficiently select interesting events while rejecting the large amount of background. The First Level trigger will reduce this rate to around $O(75$ kHz $)$. Subsequently, the High Level Trigger (HLT), comprising the Second Level trigger and the Event Filter, will reduce this rate by a factor of $O(10^3)$. Triggering on taus is important for Higgs and SUSY searches at the LHC. In this paper tau trigger selections are presented based on a lepton trigger if the tau decays leptonically or via a dedicated tau hadron trigger if the tau disintegrates semileptonically. We present signal efficiency with the electron trigger using the data sample $A\rightarrow \tau \tau \rightarrow e \, hadron$, and rate studies obtained from the dijet sample. |
Publication details |
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