We propose precise and fast-track reconstruction at hadron collider experiments, for use in online trigger decisions. We describe the features of fast-track (FTK), a highly parallel processor dedicated to the efficient execution of a fast-tracking algorithm. The hardware-dedicated structure optimizes speed and size; these parameters are evaluated for the ATLAS experiment. We discuss some applications of high-quality tracks available to the trigger logic at an early stage, by using the LHC environment as a benchmark. The most interesting application is online selection of b-quarks down to very low transverse momentum, providing interesting hadronic samples: examples are Z° bb, potentially useful for jet calibration, and multi-b final states for supersymmetric Higgs searches. The paper is generated from outside the ATLAS experiment and has not been discussed by the ATLAS collaboration.
Hadron collider triggers with high-quality tracking at very high event rates / A., Annovi; A., Bardi; M., Campanelli; R., Carosi; P., Catastini; V., Cavasinni; A., Cerri; A., Clark; M., Dell'Orso; T., Del Prete; A., Dotti; G., Ferri; Giagu, Stefano; P., Giannetti; G., Iannaccone; M., La Malfa; F., Morsani; G., Punzi; M., Rescigno; C., Roda; M., Shochet; F., Spinella; S., Torre; G., Usai; L., Vacavant; L., Vivarelli; X., Wu; L., Zanello. - In: IEEE TRANSACTIONS ON NUCLEAR SCIENCE. - ISSN 0018-9499. - 51:3 I(2004), pp. 391-400. [10.1109/tns.2004.828639]
Hadron collider triggers with high-quality tracking at very high event rates
GIAGU, Stefano;
2004
Abstract
We propose precise and fast-track reconstruction at hadron collider experiments, for use in online trigger decisions. We describe the features of fast-track (FTK), a highly parallel processor dedicated to the efficient execution of a fast-tracking algorithm. The hardware-dedicated structure optimizes speed and size; these parameters are evaluated for the ATLAS experiment. We discuss some applications of high-quality tracks available to the trigger logic at an early stage, by using the LHC environment as a benchmark. The most interesting application is online selection of b-quarks down to very low transverse momentum, providing interesting hadronic samples: examples are Z° bb, potentially useful for jet calibration, and multi-b final states for supersymmetric Higgs searches. The paper is generated from outside the ATLAS experiment and has not been discussed by the ATLAS collaboration.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
