Measurement of the $$J/\psi$$ photoproduction cross section close to threshold

Conference · Sat Sep 01 04:00:00 EDT 2018 · Proceedings of 23rd International Spin Physics Symposium — PoS(SPIN2018)

DOI:https://doi.org/10.22323/1.346.0119· OSTI ID:1969714

Chudakov, Eugene

We will present preliminary results for the J/psi close-to threshold photoproduction obtained in the GlueX experiment at Jefferson Lab. Close-to-threshold photoproduction gamma+p-->J/psi+p probes small-size gluon configuration in the proton. This reaction may also contain a contribution from the s-channel production of the LHCb pentaquark P(4.4)-->J/psi+p at beam energies of about 10 GeV. Measuring the size of the contribution allows to evaluate, or put a limit on the branching ratio of the decay P-->J/psi+p. The GlueX experiment is in the process of collecting data. The main research topic is the spectroscopy of light mesons produced by a linearly polarized photon beam with the end point of 12 GeV.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1969714
• Report Number(s): JLAB-PHY-18-2875; DOE/OR/23177-6033
• Conference Information: Journal Name: Proceedings of 23rd International Spin Physics Symposium — PoS(SPIN2018) Journal Volume: SPIN 2018
• Country of Publication: United States
• Language: English