Upper Limit on the Photoproduction Cross Section of the Spin-Exotic
- 27 December 2024
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 133 (26) , 261903
Abstract
The spin-exotic hybrid meson π_{1}(1600) is predicted to have a large decay rate to the ωππ final state. Using 76.6 pb^{-1} of data collected with the GlueX detector, we measure the cross sections for the reactions γp→ωπ^{+}π^{-}p, γp→ωπ^{0}π^{0}p, and γp→ωπ^{-}π^{0}Δ^{++} in the range E_{γ}=8-10 GeV. Using isospin conservation, we set the first upper limits on the photoproduction cross sections of the π_{1}^{0}(1600) and π_{1}^{-}(1600). We combine these limits with lattice calculations of decay widths and find that photoproduction of η^{'}π is the most sensitive two-body system to search for the π_{1}(1600).Keywords
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Funding Information
- U.S. Department of Energy (DE-FG02-87ER40315, DE-AC05-06OR23177, DE-AC02-05CH11231)
- National Science Foundation (ACI-1548562, ACI-1445606)
- Natural Sciences and Engineering Research Council of Canada
- Deutsche Forschungsgemeinschaft
- GSI Helmholtzzentrum für Schwerionenforschung
- Russian Foundation for Basic Research
- Science and Technology Facilities Council
- Comisión Nacional de Investigación Científica y Tecnológica
- National Natural Science Foundation of China
- China Scholarship Council
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