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          Institute: MPI für Kernphysik     Collection: Heavy Flavour Physics     Display Documents

ID: 29121.0, MPI für Kernphysik / Heavy Flavour Physics
The First-Level Trigger of the HERA-B experiment: performance and expectations
Authors:Balagura, V.; Bruinsma, M.; Fleckenstein, H.; Flammer, J.; Glass, J.; Manner, R.; Michetti, A.; Norenberg, M.; Pernack, R.; Popov, V.; Ressing, D.; Riu, I.; Sbrizzi, A.; Schwingenheuer, B.; Somov, A.; Uwer, U.; Wahlberg, H.; Wurz, A.
Date of Publication (YYYY-MM-DD):2002-11-21
Title of Journal:Nuclear Instruments & Methods in Physics Research Section A- Accelerators Spectrometers Detectors and Associated Equipment
Journal Abbrev.:Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip.
Issue / Number:1-3
Start Page:526
End Page:534
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:HERA-B is a fixed target spectrometer which uses 920 GeV protons incident on various target materials. The experiment is aimed to study various aspects of beauty and charm physics. The detector is designed to operate at high interaction rates with an average of 4-5 interactions per event. The First-Level Trigger (FLT) is required to reduce the input rate by more than two orders of magnitude while keeping high efficiency for beauty and charm channels. The trigger performs online track reconstruction and takes decisions based on particle momenta or pair masses. A pipeline architecture is implemented on about 100 pipelined hardware processors to perform this job. The working principle and first results of the FLT performance based on the data acquired during the run in the year 2000 are described. (C) 2002 Elsevier Science B.V. All rights reserved.
Free Keywords:HERA-B; trigger
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group W. Hofmann/Heavy Flavour Physics (K. T. Knöpfle, M. Schmelling)
External Affiliations:DESY, D-22607 Hamburg, Germany; Inst Theoret & Expt Phys, Moscow 117259, Russia; NIHKEF, NL-1009 DB Amsterdam, Netherlands; Univ Mannheim, Lehrstuhl F Informat V, D-68131 Mannheim, Germany; Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany; Univ Heidelberg, Phys Inst, D-69120 Heidelberg, Germany
Identifiers:ISI:000179527800083 [ID No:1]
ISSN:0168-9002 [ID No:2]
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