Perspectives of a Midrapidity Dimuon Program at RHIC: A Novel and Compact Muon Telescope Detector

Details Perspectives of a Midrapidity Dimuon Program at RHIC: A Novel and Compact Muon Telescope Detector Perspectives of a Midrapidity Dimuon Program at RHIC: A Novel and Compact Muon Telescope Detector

2009-04-24

arxiv.org/abs/0904.3774v4

J.Phys.G36:095001,2009

Physics

Nuclear Physics

Nuclear Experiment

18 pages, 10 figures, add more references, accepted by Journal of Physics G

Scientific paper

10.1088/0954-3899/36/9/095001

We propose a large-area, cost-effective Muon Telescope Detector (MTD) for the Solenoidal Tracker at RHIC (STAR) at mid-rapidity and for the next generation of detectors at a possible electron-ion collider. We utilize Multi-gap Resistive Plate Chambers with large modules and long readout strips (Long-MRPC) in the detector design. The results from cosmic ray and beam tests show the intrinsic timing and spatial resolution for a Long-MRPC are 60-70 ps and $\sim1$ cm, respectively. The prototype performance of such a novel muon telescope detector at STAR indicates that muon identification at the transverse momentum of a few GeV/$c$ can be achieved through the combined information of track matching with the MTD, ionization energy loss in the Time Projection Chamber, and time-of-flight measurements. A primary muon over secondary muon ratio of better than 1/3 can be achieved. This provides a promising device for future quarkonium programs and primordial dilepton measurements at RHIC. Simulations of the muon efficiency, the signal-to-background ratio of $J/\psi$, the separation of $\Upsilon$ 1S from 2S+3S states, and the electron-muon correlation from charm pair production in the RHIC environment are presented.

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