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The GlueX Experiment

The GlueX Experiment. 12 GeV electrons. GlueX. Uncollimated. Coherent Peak. Curtis A. Meyer Carnegie Mellon University The GlueX Collaboration. Collimated. 40% lin. Pol. LQCD: The Spectrum of Mesons. Flux-tube Hybrids: r 1 a 1 b 0 p 0 a 0 p 1 p 2 b 2.

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The GlueX Experiment

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  1. The GlueX Experiment 12 GeV electrons GlueX Uncollimated Coherent Peak Curtis A. Meyer Carnegie Mellon University The GlueX Collaboration Collimated 40% lin. Pol. GlueX Experiment

  2. LQCD: The Spectrum of Mesons Flux-tube Hybrids: r1 a1b0p0 a0p1p2b2 Dynamical calculation of the isovector light-quark mesons. 3 identical quarks, pion mass~700MeV Two lattice volumes Non-trivial Glue Exotic Quantum Numbers (exotic) J.J. Dudek (et al.) Phys. Rev. D 82, 034508 (2010) JPC JPC JPC GlueX Experiment

  3. LQCD: The Spectrum of Mesons Flux-tube Hybrids: r1 a1b0p0 a0p1p2b2 Dynamical calculation of the isovector light-quark mesons. 3 identical quarks, pion mass~700MeV Two lattice volumes. Non-trivial Glue Exotic Quantum Numbers Mass in the 1.6 to 2.5 GeV Range (exotic) JPC JPC JPC J.J. Dudek (et al.) Phys. Rev. D 82, 034508 (2010) GlueX Experiment

  4. Identifying Exotics rp ppp 5-10mb b1p wpp 0.2mb a2p hpp 0.2mb f1p, h’p 0.1mb wp 1mb The p1(1600) is reported in rph’p b1p f1p Decay model expectations 1 b1, f1,, a1 1(1300) , a1, f1h b2  a1 , h1, a2 h2  b1 ,  b0 (1300) , h1 h0  b1 , h1 1b1,f1,, a1 1(1300) , a1, f1h b2  a1 , h1, a2 h2 b1 , b0 (1300) , h1 h0 b1 , h1 26 weeks running, 1/3 beam on, 30% reconstruction. ~1000 evts 107g/s If we produce an exotic with a 2 nb cross section over 400 MeV in mass (peak) (20 20MeV-wide bins), we expect about 30000 events per year, or about 1000 events per bin. This is a solid signal for the expected rates. GlueX Experiment

  5. Amplitude Analysis • Determine Q.M. amplitudes (Ai) to describe data. • Fit for contributions of each Ai to get intensity and phases. • Fit for intensity and phase differences. E852 p-p -> Xp -> h’p-p NSF: Physics at the Information Frontier IU/CMU/UCONN Develop Amplitude Analysis (AA) code appropriate for GlueX analysis. This includes theoretically more correct amplitudes, better interfaces to connect the amplitudes to data, Open Science Grid tools for AA and now development of GPU based tools. OSG works for Monte Carlo production. First generation tools used on CLAS data. GPU code working on CLEO-c data. Pursuing simulated GlueX data analysis. (1-+) p1 (2++) a2 (4++) a4 GlueX Experiment

  6. Checks on the Amplitude Analysis Consider the photo production of a p1 state. Different isospin channels We should find consistent production and decay results across similar channels. We should be able to establish relative decay rates which is important when interpreting the results. Different decay modes GlueX Experiment

  7. Hall D Counting House Tagger Area w/ Electron Beam Dump Photon Beam Dump GlueX Experiment

  8. Construction has started Microscope @ UCONN Support @ UNC A&T Tagger Magnet @ JLab Tagger @ CUA Diamond @ UCONN Active Collimator @ UCONN GlueX Experiment

  9. Construction has started BCAL @ Regina 12/48 modules at JLab CDC @ CMU BCAL Readout @ USM Calibration @ Athens FCAL @ IU FDC @ JLab P.S. @ UNCW TOF @ FSU START @ FIU TRIGGER @Jlab, CNU Electronics @ JLab, ICO, UMASS, USM Solenoid @ JLab, ICO DAQ @ JLab GlueX Experiment

  10. GlueX Experiment

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