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Muon identification with the event filter of the ATLAS experiment at CERN LHC

  • Author(s): Cataldi, G
  • Dos Anjos, A
  • Wiedenmann, W
  • Zobering, G
  • Armstrong, S
  • Damazio, D
  • Maeno, T
  • Baines, JTM
  • Emeliyanov, D
  • Kirk, N
  • Wickens, FJ
  • Wielers, M
  • Bee, CP
  • Meessen, C
  • Qian, Z
  • Touchard, F
  • Biglietti, M
  • Carlino, G
  • Conventi, F
  • Bogaerts, JA
  • Conde, P
  • Ellis, N
  • Haller, J
  • Padilla, C
  • Pinto, P
  • Rosati, S
  • Santamarina, C
  • Wengler, T
  • Werner, P
  • Bosman, M
  • Casado, P
  • Garitaonandia, H
  • Osuna, C
  • Segura, E
  • Sushkov, S
  • Caron, B
  • Moore, R
  • Pinfold, JL
  • Soluk, R
  • Wheeler, SJ
  • Cataldi, G
  • Gorini, E
  • Primavera, M
  • Spagnolo, S
  • Ventura, A
  • Cavalli, D
  • Resconi, S
  • Comune, G
  • Crone, G
  • Konstantinidis, N
  • Stefanidis, E
  • Sutton, M
  • De Santo, A
  • George, S
  • Goncalo, R
  • Kilvington, G
  • Lowe, A
  • Diaz Gomez, M
  • Di Mattia, A
  • Falciano, S
  • Luminari, L
  • Nisati, A
  • Epp, B
  • Ghete, V
  • Kabana, S
  • Perez Reale, V
  • Thomas, E
  • Khomich, A
  • Kootz, A
  • Lankford, AJ
  • Masik, J
  • Mello, AG
  • De Seixas, JM
  • Morettini, P
  • Parodi, F
  • Schiavi, C
  • Negri, A
  • Scannicchio, DA
  • Vercesi, V
  • Nikitin, N
  • Sivoklokov, S
  • Panikashvili, N
  • Tarem, S
  • Tapprogge, S
  • Usai, G
  • Venda Pinto, B
  • et al.
Abstract

The Large Hadron Collider at CERN offers unprecedented challenges to the design and construction of detectors and trigger/data acquisition systems. For ATLAS, a three level trigger system has been developed to extract interesting physics signatures with a 10 rate reduction. To accomplish this, components of physics analysis traditionally deferred to off-line physics analysis must be embedded within the on-line trigger system. For the Muon trigger, the specific off-line algorithms MOORE (Muon Object Oriented REconstruction) and MuId (Muon Identification) have been adopted so far for the on-line use, imposing an operation in a Bayesian-like environment where only specific hypotheses must be validated. After a short review of the ATLAS trigger, the paper shows the general strategy of the Muon Identification and Selection accessing the full event data, or being seeded from results derived at a previous stage of the trigger chain. © 2006 IEEE. 6

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