Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session B06: Meson and Baryon SpectroscopyInvited
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Sponsoring Units: DNP GHP Chair: David Richards, Jefferson Lab Room: Sheraton Governor's Square 15 |
Saturday, April 13, 2019 10:45AM - 11:21AM |
B06.00001: Meson Spectroscopy: a Perspective from GlueX Invited Speaker: Thomas Britton In the last 15 years collaborations world-wide have contributed to the discovery of many exotic candidate states, such as those made from two quarks and two antiquarks. With these discoveries there has been renewed interest in spectroscopy and in particular, searches for other such particles. Thomas Jefferson National Accelerator Facility is home to the GlueX experiment which uses a 12 GeV electron beam incident on a diamond radiator to produce a linearly polarized, coherent Bremsstrahlung photon beam. The primary goal of GlueX is to search for so-called exotic hybrid mesons (comprised of a quark, an anti quark, and a gluon) by first mapping out the conventional spectrum of mesons starting with the often poorly understood excited vector mesons. Photoproduction at these energies is relatively unexplored and the use of a polarized beam allows GlueX to discriminate between various production mechanisms which may aid in the identification of exotic hybrid mesons. Successfully commissioned in 2015, GlueX has recently completed data taking for its first phase (GlueX-I) which represents orders of magnitude more statistics than previous photoproduction experiments. In this talk we will present an overview of the spectroscopy being performed at Jefferson Lab with a focus on GlueX. |
Saturday, April 13, 2019 11:21AM - 11:57AM |
B06.00002: Theory of heavy-quark spectroscopy Invited Speaker: Stefan Meinel Recent progress in lattice QCD studies of charm and bottom hadrons will be reviewed. I will discuss heavy baryons, heavy tetraquarks, and searches for resonances in heavy-hadron scattering. |
Saturday, April 13, 2019 11:57AM - 12:33PM |
B06.00003: Nucleon-resonance studies with CLAS and CLAS12 Invited Speaker: Steffen Strauch Baryon spectroscopy is an essential tool in the study of nucleon resonances. The spectrum of broad and overlapping nucleon excitations can be greatly clarified with photoproduction experiments, especially with the use of polarization observables. An overview of recent results from such measurements with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab and plans with the new CLAS12 detector will be presented. |
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