[Halld-physics] GHP 2021 abstract

[Mark-Macrae Dalton]

Dear Colleagues

I was asked to present cross sections and SDMEs for vector meson photoproduction at the GHP meeting.  Below is the abstract that I plan to submit tomorrow.  If it is accepted then I will withdraw my similar abstract from the APS meeting.  Please let me know if you have any comments.

Thanks.

Best,
Mark






Probe of Meson Photoproduction Mechanisms With Observables in Exclusive Vector-Meson Photoproduction

The GlueX experiment at Jefferson Lab aims to study the light meson spectrum with an emphasis on the search for hybrid mesons.  A tagged photon beam, with energies in the range 3—11.6 GeV, and a polarized component at 8.5 GeV, is incident on a hydrogen target inside a detector with near-complete neutral and charged particle coverage.  The experiment has completed its first phase of data taking, producing orders of magnitude more data than previous photoproduction experiments in this energy regime.   A good theoretical description of the production mechanisms will be needed to interpret any potential signals for exotic mesons.  Photoproduction data on conventional mesons are very useful for this purpose, where polarization observables and the energy and t-dependence of production cross sections provide complementary information.  We present new, high-statistics extractions of polarization observables and cross sections in photoproduction of vector mesons at GlueX and discuss the implications for our understanding of the production mechanisms.


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