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Content archived on 2022-12-23

Development of a Muon detection system for the compressed Baryonic matter experiment

Objective

The goal of the proposal is to design a novel muon detection system which is able to measure rare muon pairs from the decay of vector mesons created in heavy-ion collisions at FAIR beam energies. Up to date, there is no data on dimuons from heavy-ion collisions at beam energies below top SPS energies (158 AGeV). The experimental challenge is to identify soft muons in an environment of up to 1000 charged particles. We propose to develop an "active absorber" system consisting of consecutive layers of muon tracking chambers and absorbers made of iron and carbon. The muon detection system is part of the CBM experiment and has a unique research potential concerning fundamental questions of QCD, in particular in the search for chiral symmetry restoration and the deconfinement phase transition at high baryon densities. The first task is to perform realistic simulations in order to demonstrate the feasibility of such a measurement. This includes track reconstruction using hits in the Silicon tracking system and in the muon detection system, based on realistic detector responses. The simulations will provide information on the acceptance, the muon detection efficiency, and the signal-to-background ratio for vector mesons in dependence of the properties of the muon detector system like thickness and material of the absorber layers, detector granularity, number of detector layers etc. These studies will help to define the experimental requirements and to optimize the detector layout. The second task is to design, to build and to test a prototype of a muon tracking chamber with high granularity, high position resolution and high rate capability. The preferable choice for the technology might be Gas Electron Multipliers (GEM) or Micromegas. The third task is to design a segmented plastic scintillator wall which will be used to measure the energy deposit of particles. This information will help to reject hadronic showers and to improve the muon signal-to-background ratio.

Topic(s)

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Call for proposal

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Funding Scheme

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Coordinator

GESELLSCHAFT FÜR SCHWERIONENFORSCHUNG (GSI)
EU contribution
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Address
Planckstrasse, 1
Darmstadt
Germany

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Participants (4)