Online b-tagging selection for the ATLAS experiment at the LHC

Author

Kootz, Andreas ; Böhme, Jenny ; Mättig, Peter ; Siebel, Anca ; Cervetto, Mario ; Parodi, Fabrizio ; Schiavi, Carlo

Author_Institution

Bergische Univ. Wuppertal, Germany

Volume

3

fYear

2004

fDate

16-22 Oct. 2004

Firstpage

1682

Abstract

The second level trigger system (LVL2) of the ATLAS experiment at the CERN LHC is required to reduce the trigger rate from 100 kHz to about 1 kHz. The trigger decision has to be taken on average in 10 ms. The ability of identifying b-quark jets at trigger level opens many interesting physics opportunities, especially in the top quark and Higgs sectors. Additionally the acceptance for several supersymmetric channels is increased. Here we present two methods of tagging b-quark jets at trigger level. One is based on impact parameters, the other one on secondary vertex reconstruction. The algorithms and their performances are described and compared.

Keywords

nuclear electronics; position sensitive particle detectors; readout electronics; 10 ms; ATLAS experiment; CERN LHC; Higgs sector; algorithms; b-quark jets; impact parameters; online b-tagging selection; second level trigger system; secondary vertex reconstruction; supersymmetric channels; top quark sector; trigger decision; trigger rate; Delay; Detectors; Filters; Helium; Large Hadron Collider; Mesons; Physics; Pipelines; Tagging; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2004 IEEE

Conference_Location

Rome

ISSN

1082-3654

Print_ISBN

0-7803-8700-7

Electronic_ISBN

1082-3654

Type

conf

DOI

10.1109/NSSMIC.2004.1462564

Filename

1462564