Performance of the PrimEx Electromagnetic Calorimeter

Journal Article · Fri Oct 27 00:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2396938· OSTI ID:20891907

Kubantsev, M ^[1]; Larin, I ^[2]; Gasparian, A ^[3]

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1. Institute of Theoretical and Experimental Physics, Moscow, (Russian Federation)
2. Northwestern University, Evanston, Il 60208 (United States)
3. Physics Department NC A and T State University Greensboro, NC 27411 (United States)

We report the design and performance of the hybrid electromagnetic calorimeter consisting of 1152 PbWO4 crystals and 576 lead glass blocks for the PrimEx experiment at the Jefferson Laboratory. The detector was built for high precision measurement of the neutral pion lifetime via the Primakoff effect. Calorimeter installation and commissioning was completed with the first physics run in fall of 2004. We present the energy and position resolution of the calorimeter. Obtained {pi}0 mass resolution of 1.3MeV/c2 and its production angle resolution of 0.34mrad demonstrate the ability of the experiment to extract the {pi}0 lifetime on one percent level.

• OSTI ID: 20891907
• Journal Information: AIP Conference Proceedings, Vol. 867, Issue 1; Conference: 12. international conference on calorimetry in high energy physics, Chicago, IL (United States), 5-9 Jun 2006; Other Information: DOI: 10.1063/1.2396938; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
CALORIMETERS
CEBAF ACCELERATOR
COMMISSIONING
CRYSTALS
GLASS
LEAD
LEAD TUNGSTATES
LIFETIME
MASS RESOLUTION
PARTICLE DECAY
PERFORMANCE
PIONS NEUTRAL
PRIMAKOFF EFFECT