%0 Journal Article
%A Winney, D.
%A Fanelli, C.
%A Pilloni, A.
%A Fernández Ramírez, César
%A Blin, A. N. Hiller
%A Albaladejo, M.
%A Mathieu, Vincent
%A Mokeev, V. I.
%A Szczepaniak, A. P.
%T Double polarization observables in pentaquark photoproduction
%D 2019
%@ 2470-0010
%U https://hdl.handle.net/20.500.14352/12876
%X We investigate the properties of the hidden-charm pentaquark-like resonances first observed by the LHCb Collaboration in 2015, by measuring the polarization transfer K L L between the incident photon and the outgoing proton in the exclusive photoproduction of J / ψ 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 the initial-state helicity correlation A L L , 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 A L L and K L L in J / ψ exclusive photoproduction, in order to determine the pentaquark photocouplings and branching ratios.
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