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Photon-hadron physics with the GlueX detector at Jefferson Lab

CHL-2. Photon-hadron physics with the GlueX detector at Jefferson Lab. Curtis A. Meyer, Spokesperson GlueX. History of GlueX. The first meeting of what became the GlueX Collaboration occurred in July 1997 at Indiana University. The meetings that followed looked at how one

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Photon-hadron physics with the GlueX detector at Jefferson Lab

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  1. CHL-2 Photon-hadron physics with the GlueX detector at Jefferson Lab Curtis A. Meyer, Spokesperson GlueX PHP 2008 --- March 6-8 2008

  2. History of GlueX The first meeting of what became the GlueX Collaboration occurred in July 1997 at Indiana University. The meetings that followed looked at how one could explore the spectrum of hybrid mesons using photon beams. In 1999, what is now the GlueX collaboration was formed. The first PAC presentation was made and the first review of the physics program occurred. The experiment was listed as a key part of the 12 GeV upgrade in the 2002 NSAC Long range Plan. Department of Energy Milestones for the 12 GeV Upgrade: April 2004 CD0, February 2006 CD1, November 2007 CD2 Late 2008 anticpated CD3 (start of construction) 2015 anticipatre CD4 (start of physics) PHP 2008 --- March 6-8 2008

  3. The Physics of GlueX The GlueX experiment has been designed to carry out an amplitude analysis of many different final states involving charged particles and photons to study the reaction: ° p ! (n,p) X where X ultimately decays to final states with 3-6 pseudoscalar mesons. Search for exotic hybrid mesons to discover and map out their spectrum and properties. Tagged photons up to nearly 12 GeV. High photon flux. Linear polarization using coherent bremsstrahlung. Hermetic Detector for photons and charged particles. Some PID in initial stages, plans to significantly improve this. Very large data sets with relatively minimal trigger bias. PHP 2008 --- March 6-8 2008

  4. From G. Bali Lattice QCD Flux Tubes Realized ColorField: Because of self interaction, confining flux tubes form between static color charges Confinement arises from flux tubes and their excitation leads to a new spectrum of mesons PHP 2008 --- March 6-8 2008

  5. excited flux-tube m=1 ground-state flux-tube m=0 Gluonic Excitations -- Hybrids Some with non quark- antiquark QNs Lattice calculations --- 1-+ nonet is the lightest UKQCD (97) 1.87 0.20 MILC (97) 1.97 0.30 MILC (99) 2.11 0.10 Lacock(99) 1.90 0.20 Mei(02) 2.01 0.10 Bernard(04) 1.792§0.139 PHP 2008 --- March 6-8 2008

  6. What other physics can be done? Tagged photons up to nearly 12 GeV. High photon flux. Linear polarization using coherent bremsstrahlung. Hermetic Detector for photons and charged particles. Some PID in initial stages, plans to significantly improve this. Very large data sets with relatively minimal trigger bias. PHP 2008 --- March 6-8 2008

  7. What other physics can be done? During this workshop, we will see a number of discussions of other physics that can be carried out by the GlueX experiment. Some of these can be carried out simply using the GlueX data. Some will require slightly modified running of the experiment (target, photon beam energy ….) Some will require the addition of more particle identification capability. The purpose of this workshop is to get people thinking about what can be done in the GlueX experiment, and attract people to the experiment that are interested in doing this physics. PHP 2008 --- March 6-8 2008

  8. Outline of the Meeting Thursday Morning: GlueX detector and Upgrades Afternoon: Exclusive reactions at high momentum transfer and baryon resonances Friday Morning: Charm production with GlueX Afternoon: Chiral anomaly and Primakoff effect Photoproduction with nuclear targets Saturday: Morning: Spectroscopy with GlueX     Lots of time for discussion during the sessions and with people during lunch and dinner. PHP 2008 --- March 6-8 2008

  9. Workshop Dinner 6:30pm tonight: Dinner at Carrabba’s Italian Grill 12363 Hornsby Lane Newport News, VA 23602 8:30am to 9:00am Continental Breakfast PHP 2008 --- March 6-8 2008

  10. From the Organizing Committee: Elke-Caroline AschenauerJozef DudekAlex DzierbaGeorge LolosCurtis MeyerChristian Weiss Welcome to the workshop, we all look forward to some very interesting discussions and ideas. PHP 2008 --- March 6-8 2008

  11. Thanks to our Supporters The JSA Initiative Fund Jefferson Lab Carnegie Mellon University Also, thanks to Lorelei Carlson for travel and logistical support. PHP 2008 --- March 6-8 2008

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