The European hybrid spectrometer

Aguilar-Benitez, M. ; Allison, W. W. M. ; de Angelis, A. (1987) The European hybrid spectrometer Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 258 (1). pp. 26-50. ISSN 0168-9002

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The final version of the European hybrid spectrometer (EHS) is described. EHS was used in the NA27 experiment to study charm particles produced in 30 GeV/c π̅p and 40 GeV/c pp interactions. A rapid cycling, high resolution bubble chamber (LEBC) produced bubbles of 17 μm diameter which were measured with a precision of 2.5 μm. Short-lived charm particles are observed with an efficiency up to 90% (D±). The spectrometer accepts 70% of all particles produced, including approximately 100% of those in the forward hemisphere and the momenta of charged particles are measured to better than 1% over the whole momentum range. The charged particle identification detectors give information on 84% of the spectrometer tracks, half of which obtain unique identification. Two lead glass detectors measure the energy of electromagnetic showers such that the π0 mass distribution has a fwhm of 20 MeV/c2. Hadronic showers are measured with two iron/scintillator calorimeters. The mass resolutions are 3.0, 0.9 and 11 MeV/c2 for K0, Λ0. and D- charged particles respectively. The D0 mass is measured to be (1865.1 ± 1.8 ± 0.8) MeV/c2.

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ID Code:83625
Deposited On:21 Feb 2012 14:45
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