121 research outputs found
Prototype Performance of Novel Muon Telescope Detector at STAR
Research on a large-area, cost-effective Muon Telescope Detector has been
carried out for RHIC and for next generation detectors at future QCD Lab. We
utilize state-of-the-art multi-gap resistive plate chambers with large modules
and long readout strips in detector design \cite{MTDLDRD}. The results from
cosmic ray and beam test will be presented to address intrinsic timing and
spatial resolution for a Long-MRPC. The prototype performance of a novel muon
telescope detector at STAR will be reported, including muon identification
capability, timing and spatial resolution.Comment: 6 pages, 4 figures, contribution to WWND2008 proceeding
Coherent photo-produced J and dielectron yields in isobaric collisions
Recently, significant enhancements of J/ and pair
production at very low transverse momenta were observed by the STAR and ALICE
collaboration in peripheral hadronic A+A collisions. The anomaly excesses point
to evidence of coherent photon-nucleus and photon-photon interactions in
violent hadronic heavy-ion collisions, which were conventionally studied only
in ultra-peripheral collisions. The isobaric collisions performed at RHIC
provides a unique opportunity to test the existence of coherent photon products
in hadronic heavy-ion collisions. The idea is that the possible production of
coherent photon products is significantly different in different collision
systems due to the variations in their charge and nuclear density
distributions. In this letter, we focus on the peripheral collisions and
provide theoretical predictions for coherent production of J/ and
dielectron in isobaric collisions. We show that the expected yields differ
significantly to perform the experimental test
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