Year: 2020
Type: article
Abstract: We study tensor meson photoproduction outside of the resonance region, at beam energies of a few GeVs. We build a model based on Regge theory that includes the leading vector and axial exchanges. We consider two determinations of the unknown helicity couplings and fit to the recent ${a}_{2}$ photoproduction data from CLAS. Both choices give a similar description of the ${a}_{2}$ cross section but result in different predictions for the parity asymmetries and the ${f}_{2}$ photoproduction cross section. We conclude that new measurements of ${f}_{2}$ photoproduction in the forward region are needed to pin down the correct production mechanism. We also extend our predictions to the 8.5 GeV beam energy, where current experiments are running.
Institutions: Universidad Complutense de Madrid, Fondazione Bruno Kessler, European Centre for Theoretical Studies in Nuclear Physics and Related Areas, Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Thomas Jefferson National Accelerator Facility, Uniwersytet Komisji Edukacji Narodowej w Krakowie, Indiana University Bloomington, Indiana University, Universidad Nacional Autónoma de México
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: U.S. Department of Energy, Comunidad de Madrid, Consejo Nacional de Ciencia y Tecnología, Narodowe Centrum Nauki, Universidad Nacional Autónoma de México, Istituto Nazionale di Fisica Nucleare, Instituto Nazionale di Fisica Nucleare, Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México
OpenAlex ID: W3023494123