Gluonic Excitations and Experimental Hall-D at Jefferson Lab

Conference · Tue Jul 01 00:00:00 EDT 2014 · Proceedings of Science

OSTI ID:1168643

Stevens, Justin ^[1]

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1. MIT

A new tagged photon beam facility is being constructed in experimental Hall-D at Jefferson Lab as a part of the 12 GeV upgrade program. The 9 GeV linearly-polarized photon beam will be produced via coherent Bremsstrahlung using the CEBAF electron beam, incident on a diamond radiator. The GlueX experiment in Hall-D will use this photon beam to search for and study the pattern of gluonic excitations in the meson spectrum produced through photoproduction reactions with a liquid hydrogen target. Recent lattice QCD calculations predict a rich spectrum of hybrid mesons, that are formed by exciting the gluonic field that couples the quarks. A subset of these hybrid mesons are predicted to have exotic quantum numbers which cannot be formed from a simple qq^- pair, and thus provide an ideal laboratory for testing QCD in the confinement regime. In these proceedings the status of the construction and installation of the GlueX detector will be presented, in addition to simulation results for some reactions of interest in hybrid meson searches.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1168643
• Report Number(s): JLAB-PHY-14-1948; DOE/OR/23177-3174; arXiv:1407.0401
• Journal Information: Proceedings of Science, Vol. DIS; Conference: DIS 2014, Warsaw, Poland, April 28-May 2, 2014
• Country of Publication: United States
• Language: English