A short description of the new Aleph Vertex Detector (VDET 91), including the new mechanical structure and the improved DAQ system is given. The apparatus consists of two complete layers of silicon detectors with double-sided readout which provide a full x, y, z information of the impact points of charged particles. The paper shows results on signal to noise ratio for minimum ionizing particles (m.i.p.) and efficiency in hit/track matching. Results on position, impact parameter and momentum resolution are also shown as measured using high momentum muons. Finally the first preliminary study on vertexing techniques and their impact on physics analysis are discussed.
RECENT RESULTS AND RUNNING EXPERIENCE OF THE NEW ALEPH VERTEX DETECTOR
BATIGNANI, GIOVANNI;CARPINELLI, MASSIMO;FORTI, FRANCESCO;GIORGI, MARCELLO;RIZZO, GIULIANA;TONELLI, GUIDO EMILIO;TRIGGIANI, GIUSEPPE;
1992-01-01
Abstract
A short description of the new Aleph Vertex Detector (VDET 91), including the new mechanical structure and the improved DAQ system is given. The apparatus consists of two complete layers of silicon detectors with double-sided readout which provide a full x, y, z information of the impact points of charged particles. The paper shows results on signal to noise ratio for minimum ionizing particles (m.i.p.) and efficiency in hit/track matching. Results on position, impact parameter and momentum resolution are also shown as measured using high momentum muons. Finally the first preliminary study on vertexing techniques and their impact on physics analysis are discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.