2026-06-27T06:05:59Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/128762024-09-04T18:17:18Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Winney, D. author Fanelli, C. author Pilloni, A. author Fernández Ramírez, César author Blin, A. N. Hiller author Albaladejo, M. author Mathieu, Vincent author Mokeev, V. I. author Szczepaniak, A. P. author 2019-08-20 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. 2470-0010 10.1103/PhysRevD.100.034019 https://hdl.handle.net/20.500.14352/12876 https://doi.org/10.1103/PhysRevD.100.034019 Double polarization observables in pentaquark photoproduction