학술논문
Recent results and running experience of the new ALEPH Vertex Detector
Document Type
Conference
Author
Batignani, G.; Bauer, C.; Becker, H.; Bloch, B.; Boudreau, J.; Brown, D.; Bosi, F.; Bosisio, L.; Carpinelli, M.; Carr, J.; Ciocci, A.; Coyle, P.; Dell'Orso, R.; Dietl, H.; Drinkard, J.; Focardi, E.; Forti, F.; Giorgi, M.; Hansl-Kozanecka, T.; Hauff, D.; Holl, P.; Jacobsen, R.; Lancon, E.; Lauber, J.; Litke, A.; Lutz, G.; Lutjens, G.; Mannelli, E.; Manner, W.; Mattison, T.; McNeal, M.; Menary, S.; Moneta, L.; Moser, H.G.; Mours, B.; Parrini, G.; Piccinini, S.; Redlinger, G.; Rizzi, D.; Rizzo, G.; Rousseau, D.; Tonelli, G.; Triggiani, G.; Schwarz, A.S.; Schwemling, P.; Settles, R.; Seywerd, H.; Sharma, V.; Struder, L.; Vannini, C.; Verdini, P.G.; Walsh, J.; Waltermann, G.; Walther, S.; Wear, J.; Weber, F.
Source
Conference Record of the 1991 IEEE Nuclear Science Symposium and Medical Imaging Conference Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE. :438-443 vol.1 1991
Subject
Language
Abstract
A description of the new ALEPH Vertex Detectors (VEDET 91), including the new mechanical structure and the improved data acquisition system, is given. The apparatus consists of two complete layers of silicon detectors with double-sided readout which provide full x,y,z information on the impact points of charge particles. The authors present results on signal-to-noise ratio for minimum ionizing particles and efficiency in hit/track matching. Results on position, impact parameter, and momentum resolution are also shown as measured using high-momentum muons. Preliminary results on single hit and impact parameter resolution show that the detectors and VLSI read-out electronics work as expected, and the performance compares well with previous test beam results and Monte Carlo simulations. Preliminary results on precision vertex reconstruction show a significant improvement in the data analysis which will be fully exploited in studying tau , b and c physics when all statistics are available.ETX