Double Polarization Observables in Pentaquark Photoproduction
Autor: | JPAC Collaboration, Winney, Daniel, Fanelli, Cristiano, Pilloni, Alessandro, Blin, Astrid N. Hiller, Fernandez-Ramirez, Cesar, Albaladejo, Miguel, Mathieu, Vincent, Mokeev, Victor I., Szczepaniak, Adam P. |
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Rok vydání: | 2019 |
Předmět: | |
Zdroj: | Phys. Rev. D 100, 034019 (2019) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevD.100.034019 |
Popis: | We investigate the properties of the hidden charm pentaquark-like resonances first observed by LHCb in 2015, by measuring the polarization transfer KLL between the incident photon and the outgoing proton in the exclusive photoproduction of J/psi near threshold. We present a first estimate of the sensitivity of this observable to the pentaquark photocouplings and hadronic branching ratios, and extend our predictions to the case of initial state helicity correlation ALL, using a polarized target. These results serve as a benchmark for the SBS experiment at Jefferson Lab, which proposes to measure for the first time the helicity correlations ALL and KLL in J/psi exclusive photoproduction, in order to determine the pentaquark photocouplings and branching ratios. Comment: 9 pages, 7 figures, 2 tables, Version published in PRD |
Databáze: | arXiv |
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